O Kadhal Kanmani

Aditya Varadarajan is a video game developer who accidentally meets Tara Kalingarayar at his colleague's wedding. He later finds out that she is planning to pursue her studies in Paris. They soon begin to call each other often, go out together, and start to fall in love during a holiday that they take together. They agree that marriage is not for them and decide to have a live-in relationship instead, and Tara moves into Adi's place, rented from Ganapathy. They wish to spend their time with each other before they go their separate ways for their respective careers. Tara and Adi live happily, being playful with each other.

One midnight, Tara has a conversation with Ganapathy. She tells him that she might get her visa approved for going to Paris, and that it is hard for her to leave Adi and go far away. The next day, Tara goes to Jaipur for her business, and Adi starts to miss her terribly. Upon seeing the love and patience that Ganapathy has for his wife Bhavani, an Alzheimer's patient, they begin to understand the importance of each other's presence in their lives.

Soon, Adi is selected to develop his skills in video games and to go to the US. He tells his colleague that it is hard for him to leave Tara. The next day, both of them make an agreement to enjoy themselves to the maximum for the 10 days left before they separate. Nearing the last day, they begin to have little fights and arguments, which do not last long.

One day Bhavani goes missing, because she forgets the address to her house. While looking for her, they continue arguing about their relationship. Finally, Adi proposes to Tara, and they decide to get married. Post-marriage, both of them continue to accomplish their own dreams, one in Paris and the other in the US. In the post-credits, it is shown that Adi has finished his project in the US and has moved to Paris, where they reunite and have a child.

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• Dulquer Salmaan as Aditya 'Adi' Varadarajan
• Nithya Menen as Tara Kalingarayar
• Prakash Raj as Ganapathy Iyer
• Leela Samson as Bhavani Ganapathy
• Vinodhini Vaidyanathan as Saroja
• Ramya S. as Ananya
• Prabhu Lakshman as Buddy
• Siva Ananth as Vasudevan Varadarajan
• Rama Ramasamy as Chandrika
• John Devasahayam as John
• Kanika as a woman at the clinic (cameo appearance)
• B. V. Doshi as himself (cameo appearance)
• Ashwin Kumar Lakshmikanthan as Aditya's co-worker (uncredited){{Cite web |date=11 June 2015 |title=It is not a typical love story: Ashwin Kumar |url=https://timesofindia.indiatimes.com/tv/news/tamil/It-is-not-a-typical-love-story-Ashwin-Kumar/articleshow/48018141.cms |url-status=live |archive-url=https://web.archive.org/web/20190404022025/https://timesofindia.indiatimes.com/tv/news/tamil/It-is-not-a-typical-love-story-Ashwin-Kumar/articleshow/48018141.cms |archive-date=4 April 2019 |access-date=15 March 2020 |website=The Times of India}}
• Pavithra Lakshmi as Aditya's co-worker (uncredited){{Cite news|url=https://timesofindia.indiatimes.com/entertainment/malayalam/movies/news/pavithra-lakshmi-shane-referred-me-to-be-his-films-heroine/articleshow/70418954.cms|title=Pavithra Lakshmi: Shane referred me to be his film's heroine|website=The Times of India|date=29 July 2019 }}
• Arav as Aditya's co-worker (uncredited){{cite web|url=http://www.ibtimes.co.in/bigg-boss-tamil-winner-6-things-you-need-know-about-aarav-743959|title=Bigg Boss Tamil winner: 6 things you need to know about Aarav|first=Shekhar H|last=Hooli|website=ibtimes.co.in|date=October 2017|access-date=29 October 2017|url-status=live|archive-url=https://web.archive.org/web/20171010210722/http://www.ibtimes.co.in/bigg-boss-tamil-winner-6-things-you-need-know-about-aarav-743959|archive-date=10 October 2017|df=dmy-all}}{{colend}}

In early 2014, Mani Ratnam first approached Telugu actor Ram Charan to be a part of the film, but he felt the lead role would not work for him.{{cite news|url=http://www.thehindu.com/features/metroplus/i-think-ive-done-fairly-well-ram-charan/article6461320.ece|title='I think I've done fairly well'|author=Sangeetha Devi Dundoo|work=The Hindu|date=30 September 2014}} In August 2014, Madras Talkies had confirmed that Dulquer Salmaan would play the lead role in their forthcoming production and it was reported that Mani Ratnam's regular collaborator, composer A. R. Rahman would also work on the film.{{cite web|url=https://behindwoods.com/tamil-movies-cinema-news-14/who-will-play-the-lead-role-in-mani-ratnams-next.html|title=Who will play the lead role in Mani Ratnam's next?|work=behindwoods.com}}{{cite news|url=https://timesofindia.indiatimes.com/entertainment/malayalam/movies/news/Nivin-and-Dulquer-to-come-together-for-Mani-Ratnam-project/articleshow/41007907.cms|title=Nivin and Dulquer to come together for Mani Ratnam project?|work=The Times of India|date=27 August 2014 }} Vairamuthu renewed his collaboration with Mani Ratnam and A. R. Rahman to write song lyrics, and stated that the director had told him the film's plot concisely within three minutes and described it as a "beautiful love story" about "two characters and their love and mindset".{{cite news|url=http://www.thehindu.com/entertainment/mani-ratnams-threeminute-technique/article6978062.ece|title=Mani Ratnam's three-minute technique|author=Srinivasa Ramanujam|work=The Hindu|date=10 March 2015}} P. C. Sreeram joined the team later in the month, collaborating with the director after Alaipayuthey (2000).{{cite news|url=https://timesofindia.indiatimes.com/entertainment/tamil/movies/news/After-14-years-Mani-Ratnam-PC-Sreeram-to-work-together/articleshow/40859023.cms|title=After 14 years, Mani Ratnam, PC Sreeram to work together|work=The Times of India}} During the making of the film, the cinematographer hinted that the film has contents on the lines of Ratnam's Alaipayuthey (2000), and that it was also loosely based on a real life incident.[https://web.archive.org/web/20150422150507/http://www.sify.com/movies/okay-kanmani-will-be-like-alaipayuthey--2-pc-sreeram-news-tamil-pbfj4jadhgghg.html 'Okay Kanmani' will be like 'Alaipayuthey −2': PC Sreeram]. Sify.com (5 January 2015). Retrieved on 19 May 2015. In October 2014, the film was revealed to have a working title of OK Kanmani.{{cite news|url=https://timesofindia.indiatimes.com/entertainment/malayalam/movies/news/Dulquers-next-is-Ok-Kanmani-/articleshow/44900043.cms|title=Dulquers next is Ok Kanmani ?|work=The Times of India|date=22 October 2014 }}{{cite web|url=https://behindwoods.com/tamil-movies-cinema-news-14/mani-ratnam-aka-maniratnams-next-titled.html|title=Mani Ratnam aka Maniratnam's next titled!|work=behindwoods.com}}

Mani Ratnam revealed that he had the fascination for making a film on the gaming culture before Kadal, and set the story in Mumbai as it was India's gaming hub and a place where a live-in relationship can happen more naturally than in South India.{{cite news|url=http://www.thehindu.com/entertainment/return-of-the-king/article7141008.ece|title=Return of the king|author=Sudhir Srinivasan|work=The Hindu|date=25 April 2015}} He revealed it was an urban love story, and added that the Mumbai setting was also justified as it dealt with people away from home who become independent of the rules and regulations of a family.{{cite web|title = One can experiment within mainstream cinema: Mani Ratnam|url = http://bdnews24.com/film/2015/04/15/one-can-experiment-within-mainstream-cinema-mani-ratnam|website = bdnews24.com|access-date = 15 April 2015}} The film was earlier wrongly reported to be bilingual in both Tamil and Malayalam; it was made only in Tamil.{{cite news|url=https://www.thehindu.com/features/friday-review/malayalam-cinema-to-look-out-for-in-2015/article6767623.ece|title=The buzz in Mollywood|author=Vijay George|work=The Hindu|date=8 January 2015}}

In a press conference at Taj Coromandel in Chennai, Ratnam said that the film is a contemporary take on the new generation, their attitudes and their values. Through the film, Ratnam wanted to portray the change that takes place every five or six years when a new generation comes in with a different set of values.

The female lead role was initially offered to Alia Bhatt, who opted out citing her lack of ability to speak in Tamil, while Pooja Hegde also refused the offer, citing her commitment to Ashutosh Gowariker's Mohenjodaro (2016), which prevented her from working on other films.{{cite news|url=https://timesofindia.indiatimes.com/entertainment/telugu/movies/news/Pooja-Hegde-turns-down-Mani-Ratnams-film/articleshow/43427956.cms|title=Pooja Hegde turns down Mani Ratnam's film|work=The Times of India}} Parvathy Thiruvothu was also considered, before Nithya Menen was selected.{{cite web|url=https://www.indiaglitz.com/who-is-mani-ratnams-heroine--tamil-news-115495.html|title=Who is Mani Ratnams heroine?|work=indiaglitz.com|date=2 October 2014}} Dulquer and Nithya worked together on O Kadhal Kanmani alongside their commitments in Jenuse Mohamed's Malayalam film 100 Days of Love, which eventually released a month before Mani Ratnam's film.{{cite web|url=http://www.sify.com/movies/100-days-of-love-in-trouble-news-malayalam-omlpqNhhbhbdb.html|archive-url=https://web.archive.org/web/20141213094021/http://www.sify.com/movies/100-days-of-love-in-trouble-news-malayalam-omlpqNhhbhbdb.html|url-status=dead|archive-date=2014-12-13|title='100 Days of Love' in trouble?|work=Sify}} The director revealed he first met Dulquer at the audio release function of Vaayai Moodi Pesavum (2014) and felt that he was the right choice to play the character Aadi, although he hadn't seen any of the actor's films. Ratnam had only previously seen Nithya Menen's 180 (2011) and Urumi (2011), where she had played small roles but was impressed. Ratnam was quoted saying, "I found something alive about her, something real and perfectly beautiful about her. Nithya carries an individuality and is not just a glamorous girl. Like her character in the film, Tara, she has a mind of her own."

Prakash Raj accepted to play a role in the film in September 2014 and expressed his excitement at being offered a unique character.{{cite web|url=http://www.sify.com/movies/prakash-raj-joins-manis-new-film-news-tamil-okhtsucjcbgfe.html|archive-url=https://web.archive.org/web/20150924193216/http://www.sify.com/movies/prakash-raj-joins-manis-new-film-news-tamil-okhtsucjcbgfe.html|url-status=dead|archive-date=24 September 2015|title=Prakash Raj joins Mani's new film|work=Sify}} Leela Samson, a Bharathanatyam dancer and author, was selected to make her acting debut and portray a retired Carnatic singer in the film, appearing as Prakash Raj's wife.{{cite news|url=http://www.thehindu.com/features/metroplus/meet-leela-samson-the-actor/article7098913.ece|title=Meet Leela Samson the actor|author=Srinivasa Ramanujam|work=The Hindu|date=13 April 2015}} Television anchor Ramya Subramanian was also picked to play Dulquer's friend in the film, and it became her first full-fledged acting role.{{cite web|url=http://www.sify.com/movies/ramya-subramanian-moves-to-big-screen-news-tamil-ol3tUmiabdbfg.html|archive-url=https://web.archive.org/web/20141203033857/http://www.sify.com/movies/ramya-subramanian-moves-to-big-screen-news-tamil-ol3tUmiabdbfg.html|url-status=dead|archive-date=3 December 2014|title=Ramya Subramanian moves to big screen|work=Sify}} The rest of the cast consisted of Mani Ratnam's assistant directors Sivakumar Ananth and Chandrika Chandran, while his friends Rama Ramasamy, Prabhu Lakshman and the former manager of Sify, John Devasahayam, were given other roles. Actress Kanika shot for a day in Chennai, to portray a small role in the film as did architect B. V. Doshi.{{cite web|url=https://behindwoods.com/tamil-movies-cinema-news-14/ajiths-co-star-returns-after-8-years-for-mani-ratnams-next.html|title=Ajith's co-star returns after 8 years, for Mani Ratnam|work=behindwoods.com}} A number of rookie actors, who later went onto feature in larger projects, including Arav, Ashwin Kumar Lakshmikanthan, Ciby Bhuvana Chandran and Pavithra Lakshmi made appearances as colleagues of Dulquer's character.{{Cite news|url=https://timesofindia.indiatimes.com/entertainment/tamil/movies/did-you-know/nafeez-arav-played-dulquers-friend-in-o-kadhal-kanmani/articleshow/62650412.cms|title = Nafeez Arav played Dulquer's friend in O Kadhal Kanmani|website = The Times of India| date=25 January 2018 }}{{Cite news|url=https://timesofindia.indiatimes.com/tv/news/tamil/It-is-not-a-typical-love-story-Ashwin-Kumar/articleshow/48018141.cms|title = It is not a typical love story: Ashwin Kumar|website = The Times of India| date=11 July 2015 }}{{Cite news|url=https://timesofindia.indiatimes.com/entertainment/malayalam/movies/news/pavithra-lakshmi-shane-referred-me-to-be-his-films-heroine/articleshow/70418954.cms|title = Pavithra Lakshmi: Shane referred me to be his film's heroine|website = The Times of India| date=29 July 2019 }}

Principal photography began from 6 October 2014 with scenes featuring Dulquer Salmaan and Nithya Menen being filmed.{{cite web|title = Mani Ratnam's next to roll out from Oct 6|url = https://timesofindia.indiatimes.com/entertainment/telugu/movies/news/Mani-Ratnams-next-to-roll-out-from-Oct-6/articleshow/44002775.cms|work = The Times of India|date = 1 October 2014}} Menen revealed that the film would be shot in a short span of time and her portions would be completed by December 2014, while the team swiftly shot scenes at locations in and around Chennai, including near a bank in Parry's Corner. The last leg of filming, started in Mumbai in November 2014 with the shooting lasting for a week.{{cite news|title = Dulquer takes a 10-day break during the shoot of Mani Ratnam film|url = https://timesofindia.indiatimes.com/entertainment/malayalam/movies/news/Dulquer-takes-a-10-day-break-during-the-shoot-of-Mani-Ratnam-film/articleshow/45258675.cms|work = The Times of India|first = Shruthi|last = Karthikeyan| date=25 November 2014 |access-date = 25 November 2014}} The team shot scenes at Indian Institute of Management Ahmedabad and CEPT University during December 2014, with renowned Indian architect B. V. Doshi filming for a guest appearance as Nithya's mentor. The team subsequently moved back to film further outdoor sequences in Mumbai, later that month.{{cite news|url=http://www.thehindu.com/entertainment/okay-kanmani-mani-ratnams-quickest-project/article6675674.ece|title=Okay Kanmani: Mani Ratnam's quickest project?|author=IANS|work=The Hindu|date=9 December 2014}}{{cite web|url=http://www.sify.com/movies/okay-kanmani-unit-starts-new-schedule-in-ahmedabad-news-tamil-omfj34eicbifh.html|archive-url=https://web.archive.org/web/20150201171012/http://www.sify.com/movies/okay-kanmani-unit-starts-new-schedule-in-ahmedabad-news-tamil-omfj34eicbifh.html|url-status=dead|archive-date=1 February 2015|title='Okay Kanmani' unit starts new schedule in Ahmedabad|work=Sify}} Following the schedule, P. C. Sreeram revealed that the film was practically complete and that the film would aim to release in early 2015.{{cite web|url=http://www.sify.com/movies/mani-ratnams-okay-kanmani-is-almost-complete-news-tamil-omil01ibgdaae.html|archive-url=https://web.archive.org/web/20150924184134/http://www.sify.com/movies/mani-ratnams-okay-kanmani-is-almost-complete-news-tamil-omil01ibgdaae.html|url-status=dead|archive-date=24 September 2015|title=Mani Ratnam's 'Okay Kanmani' is almost complete|work=Sify}}

The game animations for the film were handled by Studio Dreamcatcher, who worked on two versions of a fictional game called Mumbai 2.0, which Dulquer's character develops in the film. A 2D prototype and a 3D 2.0 version were created for the film, while the team also took care of the animation sequences for the end credit segments. The company also took care of character designs, story board and animatics of the lead characters Dulquer, Nithya and John for the 3D sequences.{{cite news|url=http://www.thehindu.com/features/metroplus/studio-dreamcatcher-and-cocoman/article7176727.ece|title=Studio Dreamcatcher and Cocoman|author=Aswin V. N.|work=The Hindu|date=6 May 2015}} The 2D animated opening title sequence for the film was handled by Mumbai-based animation studio Plexus.{{cite news|url=https://timesofindia.indiatimes.com/entertainment/tamil/movies/news/Tamil-directors-opt-for-animation-to-make-an-impact/articleshow/47187524.cms|title=Tamil directors opt for animation to make an impact|website=The Times of India}} The film's title was changed in February 2015 from OK Kanmani to O Kadhal Kanmani in an attempt to gain an entertainment tax exemption in Tamil Nadu, through the use of a pure Tamil title.{{cite news|author=Udhav Naig|title=What's in a name? A couple of crores maybe|url=http://www.thehindu.com/news/cities/chennai/whats-in-a-name-a-couple-of-crores-maybe/article6930809.ece|work=The Hindu|date=25 February 2015}}

{{main|O Kadhal Kanmani (soundtrack)}}

The soundtrack and film score were composed by A. R. Rahman. The lyrics were written by Vairamuthu whereas Sirivennela Sitaramasastri wrote the Telugu lyrics for the dubbed version.{{cite web|url = https://timesofindia.indiatimes.com/entertainment/telugu/music/Seetharamasastry-to-write-lyrics-for-Mani-Ratnams-film/articleshow/46357808.cms|title = Seetharamasastry to write lyrics for Mani Ratnam's film|date = 24 February 2015|access-date = 24 February 2015|work = The Times of India}}{{cite web|title=Mani Ratnam is calling the shots!!|url=https://www.behindwoods.com/tamil-movies-cinema-news-14/mani-ratnam-is-calling-the-shots-for-dulquer-and-nithya-menen.html#|work=Behindwoods.com|date=13 October 2014}} The soundtrack album was noted to be "youthful" with Carnatic themes.{{cite web|title = Rahman Rocks Music Charts with 'OK Kanmani'|date = 9 April 2015|url = https://www.thequint.com/2015/apr/09/rahman-rocks-music-charts-with-ok-kanmani|access-date = 15 April 2015}} Since Leela Samson plays the role of an old Carnatic singer in the film, there is a tinge of Carnatic music in the film. Ratnam wanted an original soundtrack from Rahman that is contemporary as well as trendy. Rahman's son, A. R. Ameen sang the track "Maula Wa Sallim" in Arabic. A first preview of the song "Mental Manadhil (Male version)" was released on 13 March 2015,{{cite web|date=13 March 2015|title=Mental Manadhil song: A glimpse|url=https://timesofindia.indiatimes.com/entertainment/tamil/music/Mental-Manadhil-song-A-glimpse/articleshow/46572729.cms|access-date=15 March 2015|work=The Times of India}} while the full song was released as a single on 15 March 2015.{{Cite news|last=Ramanujam|first=Srinivasa|date=15 March 2015|title=Being 'Mental Manadhil' about Rahman's music|language=en|newspaper=The Hindu|url=http://www.thehindu.com/entertainment/being-mental-manadhil-about-rahmans-music/article7003487.ece|access-date=15 April 2015|issn=0971-751X}} The soundtrack album was released by Sony Music India on the midnight of 3 April 2015.{{cite web|title=O Kadhal Kanmani audio release on April 3|url=http://www.sify.com/movies/o-kadhal-kanmani-audio-release-on-april-4-news-tamil-pebrsofbbbfie.html|archive-url=https://web.archive.org/web/20150402053728/http://www.sify.com/movies/o-kadhal-kanmani-audio-release-on-april-4-news-tamil-pebrsofbbbfie.html|url-status=dead|archive-date=2 April 2015|access-date=1 April 2015|website=Sify}}

Social media promotions were handled by Chennai-based group, Uptown Ideas, and the film's presence on Facebook and Twitter succeeded in garnering praise and creating anticipation before release.{{cite news|author=G. Krishnakumar|title=Love's in the air|url=http://www.thehindu.com/news/national/kerala/loves-in-the-air/article7017944.ece|work=The Hindu|date=21 March 2015}} The team had initially been assigned by Mani Ratnam to handle radio promotions, but consequently also managed online marketing and liaised with the director, sending him ideas of potential campaigns for approval. The team established a concept titled OKK Love Stories, with couples from all walks of life encouraged to share their love stories of how they met, keeping with the theme of the film.{{cite news|author=Priyanka Rajagopalan|title=OKK and Kanchana −2 online promotions|url=http://www.thehindu.com/features/metroplus/okk-and-kanchana-2-online-promotions-uptown-girls/article7176794.ece|work=The Hindu|date=6 May 2015}} The first poster of the Tamil and the dubbed Telugu version of the film were released on 14 February 2015.{{cite web|date=14 February 2015|title=V-day treat from Dulquer Salman and Nithya Menon|url=http://english.manoramaonline.com/entertainment/entertainment-news/dulquer-salman-and-nithya-menon-mani-ratnam-movie-ok-kanmani-100-days-of-love.html|access-date=14 February 2015|work=Manorama Online}} The theatrical trailer was released subsequently released on 1 March 2015.{{cite web|date=1 March 2015|title=Watch: Mani Ratnam's take on modern romance in 'OK Kanmani' trailer|url=https://zeenews.india.com/entertainment/movies/watch-mani-ratnams-take-on-modern-romance-in-ok-kanmani-trailer_1554465.html|access-date=1 March 2015|publisher=Zee News}}

On 8 April 2015, the film was awarded a "U/A" certificate by the Central Board of Film Certification because of some "adult content" in the film. The makers then sent the film to the revising committee to acquire a "U" (Universal) certificate, but the status remained unchanged.{{cite web|url = https://www.behindwoods.com/tamil-movies-cinema-news-15/mani-ratnams-ok-kanmani-has-been-censored-with-a-ua-april-17th-release-plan.html|title = No change in OK Kanmani's censor status !!|date = 9 April 2015|access-date = 9 April 2015|publisher = Behindwoods}} A dubbed Telugu version was also developed to be released simultaneously titled OK Bangaram, with actor Nani selected to providing dubbing for Dulquer's character.{{cite news|url=http://www.thehindu.com/todays-paper/tp-features/tp-metroplus/style-factor-in-jil-will-make-it-stand-out-director-with-image/article7025337.ece|title=Style factor in Jil will make it stand out: Director|work=The Hindu|date=24 March 2015}}

The film was distributed by Studio Green in 350 theatres in Tamil Nadu whereas producer Dil Raju's Sri Venkateswara Creations distributed the Telugu version.{{cite web|title = O Kadhal Kanmani (aka) OK Kanmani will release in around 350 theaters in Tamil Nadu. The movie's length is 138 minutes.|url = https://www.behindwoods.com/tamil-movies-cinema-news-15/o-kadhal-kanmani-aka-ok-kanmani-will-release-in-around-350-theaters-in-tamil-nadu-the-movies-length-is-138-minutes.html|website = www.behindwoods.com|access-date = 12 April 2015}}{{cite news|url=http://www.thehindu.com/todays-paper/tp-features/tp-metroplus/dil-raju-to-release-mani-ratnams-next/article6910288.ece|title=Dil Raju to release Mani Ratnam's next|work=The Hindu|date=19 February 2015|access-date=19 February 2015}} O Kadhal Kanmani was released worldwide on 17 April 2015.

The film premiered on Amazon Prime Video in Tamil language

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O Kadhal Kanmani received positive reviews from critics upon release, with International Business Times India calling it "the director's best in recent years" in their initial review round-up.{{cite web|title='Ok Kanmani' Review Round-up: Dulquer Salmaan-Nithya Menen's Film Gets Positive Response|url=https://www.ibtimes.co.in/ok-kanmani-review-round-dulquer-salmaan-nithya-menens-film-gets-positive-response-629757|website=International Business Times India|date=20 April 2015|access-date=25 April 2015}}

Baradwaj Rangan of The Hindu wrote, "O Kadhal Kanmani is something of a greatest-hits package of Mani Ratnam", while also singling out Nithya Menen's performance for praise. He added "we’re all going to have our favourite scenes with her" and "if Mani Ratnam keeps employing actors like her, he may not need to write those zingers anymore."{{Cite news|title = O Kadhal Kanmani: A lightweight but enjoyable romance|url = https://www.thehindu.com/features/cinema/cinema-reviews/a-lightweight-but-enjoyable-romance/article7113868.ece|newspaper = The Hindu|date = 17 April 2015|access-date = 17 April 2015|issn = 0971-751X|language = en|first = Baradwaj|last = Rangan}} Anupama Subramanian of Deccan Chronicle wrote, "After a couple of lackluster flicks, master story teller Mani Ratnam is back with a bang with a feel good complete romantic movie O Kadhal Kanmani. There are a few overall glitches, nevertheless, watch OKK for its fresh approach and feel-good entertainment it offers." She awarded the film 3 stars out of 5.{{cite web|title = Movie review 'O Kadhal Kanmani': Mani Ratnam is back with a bang|date = 17 April 2015|url = https://www.deccanchronicle.com/150417/entertainment-kollywood/article/movie-review-o-kadhal-kanmani-mani-ratnam-back-bang|access-date = 17 April 2015}} Reviewing for Firstpost, Latha Srinivasan stated, "O Kadhal Kanmani celebrates romance, an emotion that is as old as creation itself (remember Adam and Eve?). Mani Ratnam is back, with a 21st century love story that will charm you."{{cite web|title = O Kadhal Kanmani: Mani Ratnam is back, with a 21st century love story that will charm you|url = http://www.firstpost.com/bollywood/o-kadhal-kanmani-mani-ratnam-back-21st-century-love-story-will-charm-2201500.html|access-date = 17 April 2015}} Udhav Naig of The Hindu said "Ratnam has made a film that will not only resonate with audiences across India but has also truly retained the Tamil flavor".{{Cite news|title = O Kadhal Kanmani: Mani Ratnam has regained his touch|url = http://www.thehindu.com/features/cinema/cinema-reviews/ok-kanmani-mani-ratnam-has-regained-his-touch/article7113724.ece|newspaper = The Hindu|date = 17 April 2015|access-date = 17 April 2015|issn = 0971-751X|language = en|first = Udhav|last = Naig}} Naig called it is as one of those films in which everything seems to have come together: music, acting, editing and the cinematography. The critical review board of Behindwoods gave the film 3.25 stars out of 5 stating, "Okay, moral of the story – One fine morning, Mani Ratnam got up and decided to make something special for all young people out there. He then makes OK Kanmani, and in style".{{cite web|title = O Kadhal Kanmani (aka) OK Kanmani review|url = https://behindwoods.com/tamil-movies/o-kadhal-kanmani/o-kadhal-kanmani-review.html|website = behindwoods.com|access-date = 17 April 2015}}

Critics based at Sify stated, "The premise is simple, the story is focused. Technically OK Kanmani is superior as both AR Rahman and PC Sreeram have given their career best work for Mani Ratnam as the master craftsman himself is in tremendous form. O Kadhal Kanmani is definitely above a notch compared to the mediocre cinema we have been subjected to lately."{{cite web|title = O Kadhal Kanmani| website=Sify |url = http://www.sify.com/movies/o-kadhal-kanmani-review-tamil-perqqDfgdebih.html|archive-url = https://web.archive.org/web/20150417205522/http://www.sify.com/movies/o-kadhal-kanmani-review-tamil-perqqDfgdebih.html|url-status = dead|archive-date = 17 April 2015|access-date = 17 April 2015}} Sudhish Kamath wrote, "OK Kanmani is unfortunately that Uncle who makes you believe that marriage is the answer to your conflict of living in without any expectations from each other."{{cite web|title = OK Kanmani: Unlimited thaali please, we are South Indians|date = 18 April 2015|url = https://madrasink.com/2015/04/18/ok-kanmani-unlimited-thaali-please-we-are-south-indians/|access-date = 18 April 2015}} Haricharan Pudipeddi for Hindustan Times said that the film is a refreshing take on romance and relationship. This is his best work in years and this magical spell won't be forgotten easily. By throwing the spotlight on modern India's idea of romance, Ratnam has also succeeded in making us root for an older couple madly in love in O Kadhal Kanmani."[https://web.archive.org/web/20150419093537/http://www.hindustantimes.com/movie-reviews/o-kadhal-kanmani-review-a-refreshing-take-on-romance-and-relationship/article1-1338585.aspx O Kadhal Kanmani review: Mani Ratman's back with vintage romance]. Hindustantimes.com (21 April 2015). Retrieved on 19 May 2015. Karthik Keramalu of IBN Live stated that the film is a love letter to the audience. He went on to call the film as, 'Mani Ratnam's timely reflection of our society' which mustn't be missed.{{cite web|title = 'OK Kanmani' review: Mani Ratnam's timely reflection of our society is the one you shouldn't miss-South Cinema News – IBNLive Mobile|url = http://www.ibnlive.com/news/movies/ok-kanmani-review-mani-ratnams-timely-reflection-of-our-society-is-the-one-you-shouldnt-miss-982560.html|website = IBNlive|access-date = 18 April 2015}} He rated the film 5 out of 5. R. S. Prakash of Bangalore Mirror wrote, "Mani delves into the plot of live-in relationship, but he has chosen not to go overboard, given the sensitivity of the subject, especially in his part of the world. The screenplay, though a bit implausible at places, flows steadily, carrying the touches of the master filmmaker."{{cite web|title = Movie Review: Oh Kadhal Kanmani – Bangalore Mirror|url = https://bangaloremirror.indiatimes.com/entertainment/reviews/Movie-Review-Oh-Kadhal-Kanmani/articleshow/46961621.cms|access-date = 18 April 2015}} Writing for The Times of India M. Suganth said, "The filmmaker shows that his touch is intact and he can still make a romance come alive on screen." The film was rated 3.5 out of 5 by him.{{cite news|title = O Kadhal Kanmani Movie Review, Trailer, & Show timings at Times of India|url = https://timesofindia.indiatimes.com/entertainment/tamil/movie-reviews/O-Kadhal-Kanmani/movie-review/46961915.cms|website = The Times of India|access-date = 18 April 2015}} Indo-Asian News Service stated, "By throwing the spotlight on modern India’s idea of romance, Ratnam has also succeeded in making us root for an older couple madly in love in “O Kadhal Kanmani”."{{cite web|title = Movie review: 'O Kadhal Kanmani'|url = http://indianexpress.com/article/entertainment/regional/o-kadhal-kanmani-review-o-kadhal-kanmani-with-you-without-you/|date = 18 April 2015|work=indianexpress.com}} S. Saraswathi of Rediff.com gave the film 3.5 out of 5 stars claiming that it has, "director's trademark, unique narrative style, realistic characters, and excellent performances coupled with great music and stunning visuals".{{cite web|title = Review: O Kadhal Kanmani is a celebration of love|url = https://www.rediff.com/movies/review/review-o-kadhal-kanmani-is-a-celebration-of-love-south/20150417.htm|access-date = 19 April 2015}}

Madras Talkies made the film at a cost of ₹6 crores and upon release, it immediately became a profitable venture for producers and distributors, amassing ₹14.73 crore from its Tamil and Telugu dubbed version worldwide, within four days of release.{{cite web|url=http://indianexpress.com/article/entertainment/regional/mani-ratnams-tamil-film-o-kadhal-kanmani-mints-over-rs-14-crore-in-4-days-of-release/|title=Mani Ratnam's Tamil film 'O Kadhal Kanmani' mints over Rs.14 crore in 4 days of release|date=21 April 2015|work=The Indian Express}}{{cite web|url=https://www.dnaindia.com/entertainment/report-kanchana-2-ok-kanmani-rock-the-box-office-this-week-2079704|title='Kanchana 2', 'OK Kanmani' rock the box office this week|work=dna|date=22 April 2015}}

In Tamil Nadu, O Kadhal Kanmani grossed nearly ₹6.30 cr in its first three days, opening at second place behind Kanchana 2 and experienced particular success in multiplexes as expected.{{cite web|url=https://www.behindwoods.com/tamil-movies/o-kadhal-kanmani/o-kadhal-kanmani-box-office-apr-26.html|title=O Kadhal Kanmani box office collection|work=behindwoods.com}}

O Kadhal Kanmani also did "exceptional business" overseas, with theatrical rights sold worldwide for ₹2 crore. The venture managed to gross approximately $714, 000 (₹4.42 crore) from the US market alone, becoming one of the most successful Tamil films of all time in the US, as its acquisition price was very low compared to its business.[https://www.hindustantimes.com/regional-movies/with-kaatru-veliyidai-mani-ratnam-continues-to-explore-love-complex-identities/story-jlpIpy5moTVozIOgyUJyyK.html With Kaatru Veliyidai, Mani Ratnam continues to explore love, complex identities | regional movies]. Hindustan Times. Retrieved on 8 July 2017.{{cite news|url=http://www.thehindu.com/features/cinema/boom-time-for-kollywood-overseas/article7238858.ece?secpage=true&secname=entertainment|title=Boom time for Kollywood overseas|author=Sreedhar Pillai|work=The Hindu|date=23 May 2015}} During the opening weekend, the Tamil version of the film grossed ₹2.76 crs in the USA while the Telugu version grossed a further ₹1.40 crs. Likewise on the opening weekend in Australia, it grossed ₹50.82 lakhs and in the UK, the film has grossed ₹46.62 lakhs. Trade pundits remarked that the film was a "trade favourite" in the overseas market and predicted massive profits for the producers.{{cite web|url=http://www.sify.com/movies/ok-kanmani-beats-yennai-arindhaal-and-kaththi-news-tamil-pe2k6rjdigabj.html|archive-url=https://web.archive.org/web/20150501083552/http://www.sify.com/movies/ok-kanmani-beats-yennai-arindhaal-and-kaththi-news-tamil-pe2k6rjdigabj.html|url-status=dead|archive-date=1 May 2015|title='OK Kanmani' beats 'Yennai Arindhaal' and 'Kaththi'|work=Sify}} Ten extra screen were added for the second week of the film in the US, and within a week, it became the second highest-grossing Tamil film of 2015, behind I.{{cite web|url=https://www.behindwoods.com/tamil-movies-cinema-news-15/mani-ratnams-ok-kanmani-has-grossed-520084-in-usa-till-date.html|title=Mani Ratnam's OK Kanmani has grossed 520,084 $ in USA till date|work=behindwoods.com}}{{cite web|url=https://www.indiaglitz.com/o-kadhal-kanmani-ok-kanmani-kanchana-2-box-office-collection-by-sreedhar-pillai-tamil-news-130972.html|title='Kanchana 2' and 'OK Kanmani' Rock the Summer Box Office|work=indiaglitz.com|date=22 April 2015}} The film subsequently completed its run in the US, finishing at number seven on the all-time list. Similarly in the UK, the film completed a month-long run at the box office, unheralded for a film not featuring an established leading actor.{{cite web|url=http://www.glintcinemas.com/2015/04/o-kadhal-kanmani-2nd-weekend-collection-in-overseas.html|title=O Kadhal Kanmani 2nd weekend collection in overseas|author=GC|work=Glint Cinemas}}

The film is available for streaming in Disney+Hotstar,{{cite web|url=https://www.hotstar.com/in/movies/o-kadhalkanmani/1000172465|title=O Kadhal Kanmani|work=Hotstar}} Amazon Prime Video{{cite web|url=https://www.primevideo.com/detail/O-Kadhal-Kanmani/0H3CJRSLBP9UKLW2MTPQW9DXJR|title=O Kadhal Kanmani|work=Amazon prime}} and Netflix.{{cite web|url=https://www.netflix.com/in/title/81464602|title=O Kadhal Kanmani|work=Netflix}}

A Hindi remake of the film was officially announced in November 2015, with Aditya Roy Kapur and Shraddha Kapoor portraying the lead roles, and directed by Shaad Ali. Karan Johar announced in late 2015 that he would produce the project in association with Mani Ratnam.{{cite web|url=https://timesofindia.indiatimes.com/entertainment/hindi/bollywood/news/Aashiqui-2-lovers-Aditya-Roy-Kapur-and-Shraddha-Kapoor-reunite-for-another-romance/articleshow/49812457.cms|title=Aashiqui 2 lovers – Aditya Roy Kapur and Shraddha Kapoor reunite for another romance|work=The Times of India|access-date=17 November 2015|date=17 November 2015}} Titled OK Jaanu, the film began production in March 2016 and was released in January 2017.{{cite web|url=https://www.deccanchronicle.com/entertainment/bollywood/290216/shraddha-kapoor-and-aditya-roy-kapur-soaked-in-love-in-the-new-poster-of-ok-janu.html |title=Shraddha Kapoor and Aditya Roy Kapur look adorable in the new poster of OK Janu |website=Deccanchronicle.com |date=29 February 2016 |access-date=16 January 2017}}

O Kadhal Kanmani has gained a cult status over the years. It is noted for its fresh take on modern day love, strong characters and for portraying live-in relationship.{{cite web|url=https://www.scoopwhoop.com/entertainment/o-kadhal-kanmani-will-always-be-one-of-the-best-romances/|title=Why Mani Ratnam's 'OK Kanmani' Still Remains One Of The Best Depictions Of Modern Day Love|author=Akanksha Bhatia|work=ScoopWhoop|date=20 October 2021 |accessdate=25 November 2023}}{{cite web|url=https://www.indiatoday.in/movies/standpoint/story/throwback-thursday-how-mani-ratnam-s-ok-kanmani-normalised-live-in-relationships-in-tamil-films-1667493-2020-04-16|title=How Mani Ratnam's OK Kanmani normalised live-in relationships in Tamil films|author=Janani K|work=India Today|date=16 April 2020 |accessdate=28 December 2023}} Nithya Menen's character Tara is considered among the most memorable female characters of Tamil cinema.{{cite web |title=30 memorable female characterisations in Tamil cinema of the new millennium |url=https://www.cinemaexpress.com/photos/slideshows/2020/Mar/08/top-30-memorable-female-characterisations-in-tamil-cinema-of-the-new-millennium-934.html |website=Cinema Express |date=8 March 2020 |accessdate=10 August 2020 |archive-date=18 March 2021 |archive-url=https://web.archive.org/web/20210318144809/https://www.cinemaexpress.com/photos/slideshows/2020/Mar/08/top-30-memorable-female-characterisations-in-tamil-cinema-of-the-new-millennium-934.html |url-status=live }} Rediff.com placed her in its "Top 5 Tamil Actresses" list of 2015.{{Cite web |title=The Top Performances by Tamil Actresses in 2015 |author=S Saraswathi |work=Rediff.com |accessdate=19 December 2016 |url=https://www.rediff.com/movies/report/the-top-5-tamil-actresses/20160108.htm |archive-date=3 November 2017 |archive-url=https://web.archive.org/web/20171103044612/http://m.rediff.com/amp/movies/report/the-top-5-tamil-actresses/20160108.htm |url-status=live}} Her performance is regarded as one of the "100 Greatest Performances of the Decade" by Film Companion.{{Cite web |title=100 Greatest Performances of the Decade |url=https://filmcompanion.in/best-of-the-decade/100-best-performances-indian-cinema.html |archive-url=https://web.archive.org/web/20191219043509/https://www.filmcompanion.in/best-of-the-decade/100-best-performances-indian-cinema.html |url-status=dead |archive-date=19 December 2019 |access-date=14 November 2020 |website=Film Companion |language=en}}

Praising the film, actor Amitabh Bachchan said: "Mani Ratnam's film is a sweet and endearing story of love among the young. Fresh and with a sense of the changing times, in keeping with the sensibilities of this generation, it shows compassion and example with great dexterity."{{cite web|url=https://www.ndtv.com/entertainment/amitabh-bachchan-says-ok-kanmani-is-an-endearing-story-757848|title=Amitabh Bachchan says OK Kanmani is an 'endearing story'|work=NDTV India|accessdate=31 December 2021}} Song titles from the film's soundtrack were later used as titles for Tamil films, with Parandhu Sella Vaa (2016) beginning production in December 2015 and a film titled Sinamika starting in May 2016.{{cite web|url=https://www.iflicks.in/Home/News/2016/04/06132904/Luthfudeen-Basha-debuts-as-a-hero.vpf |title=OK Kanmani's hit song becomes a title now ...||Luthfudeen-Basha-debuts-as-a-hero |website=Iflicks.in |date=6 April 2016 |access-date=16 January 2017}}{{cite web|url=https://timesofindia.indiatimes.com/entertainment/tamil/movies/news/Pavan-goes-the-folk-way-for-Nagarvalam/articleshow/52868231.cms |title=Pavan goes the folk way for Nagarvalam |website=Timesofindia.indiatimes.com |date=23 June 2016 |access-date=16 January 2017}} A Telugu film titled Mental Madhilo also began production in late 2016.[https://www.behindwoods.com/tamil-movies-cinema-news-16/nivetha-pethuraj-on-her-telugu-debut-film-mental-madhilo.html Nivetha Pethuraj on her Telugu debut film Mental Madhilo]. Behindwoods.com (11 February 2017). Retrieved on 2017-07-08. In March 2020, the film's choreographer Brindha launched her first film as a director and titled the film as Hey Sinamika (2022) with Dulquer in the lead role.{{Cite news|url=https://www.thehindu.com/entertainment/movies/choreographer-brindha-turns-director-casts-dulquer-salmaan-kajal-aggarwal-and-aditi-rao-hydari/article31047895.ece|title = Choreographer Brindha turns director, casts Dulquer Salmaan, Kajal Aggarwal and Aditi Rao Hydari|newspaper = The Hindu|date = 12 March 2020}}

{{reflist|30em}}

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Category:2015 films

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