Cillian O'Sullivan

{{Short description|American-born Irish actor}}

Cillian O'Sullivan (born {{birth based on age as of date|29|2019|03|noage=1}}){{cite web|url = https://www.echolive.ie/corklives/arid-40156802.html | publisher = The Echo | website = echolive.ie | title = Cork men set for film premiere on Paddy's Day | date = 16 March 2019 | accessdate = 5 February 2022}} is an American-born Irish actor who has had roles in Then You Run (Sky 2023), In From the Cold (Netflix 2022),{{cite news|url = https://redfm.ie/post/cork-actor-cillian-o-sullivan-lands-lead-role-in-new-netflix-series-in-from-the-cold/| publisher = Red FM | newspaper = Redfm | title = Cork Actor Cillian O'Sullivan Lands Lead Role In New Netflix Series 'In From The Cold' | date = 27 January 2022 | accessdate = 5 February 2022}} Bull (CBS 2019),{{cite web|url = https://www.castingnetworks.com/news/my-casting-story-cillian-osullivan-on-in-from-the-cold/ | website = castingnetworks.com | title= My Casting Story: Cillian O'Sullivan on 'In from the Cold' | date = 6 April 2022 | accessdate = 8 July 2022}} Vikings (History 2016),{{cite web|url = https://www.rte.ie/entertainment/2022/0126/1276042-corks-cillian-osullivan-comes-in-from-the-cold/ | publisher = RTÉ | website = rte.ie | title = Cork's Cillian O'Sullivan comes In From the Cold | date = 27 January 2022 | accessdate = 5 February 2022}} 6Degrees (BBC 2012),{{cite web|url = https://www.radiotimes.com/tv/drama/in-from-the-cold-cast-netflix/ | website = radiotimes.com | title = Meet the cast of Netflix's In From the Cold | accessdate = 5 February 2022}} Single-Handed (RTÉ 2009),{{cite web|url = https://www.bbc.com/news/uk-northern-ireland-17154057 | publisher = BBC | website = bbc.com | title = BBC drama follows six freshers starting university in Belfast | date = 24 February 2012 | accessdate = 5 February 2022 }} and Seacht (BBC/TG4 2008).{{cite web|url = https://www.bbc.co.uk/programmes/profiles/1PQwcfmhXgLzsQVWMwSS737/conor-martin| publisher = BBC | website = bbc.co.uk | title = 6Degrees - Conor Martin | accessdate = 5 February 2022}}

Born in New York to Irish parents, O'Sullivan's family moved back to Ireland when he was a child, and he attended school in Ballinlough, Cork.{{cite web|url = https://www.irishexaminer.com/lifestyle/artsandculture/arid-40799478.html | publisher= Irish Examiner | website = irishexaminer.com | title = In From the Cold: Cork actor Cillian O'Sullivan on his new Netflix spy thriller | date = 4 February 2022 | accessdate = 5 February 2022}} From an Irish-speaking family, his first television roles were in Irish language productions for TG4. After roles in several BBC productions, and playing Bobby Storey in the 2017 film Maze, O'Sullivan moved to the US, obtaining recurring roles in NBC and Netflix series. Misty Button, in which he had a lead role,{{cite web|url = https://www.independent.ie/regionals/cork/news/cork-actors-cillian-osullivan-and-shaun-kennedy-feature-in-new-york-crime-caper-movie-misty-button/40764297.html | work = The Corkman | title = Cork actors Cillian O'Sullivan and Shaun Kennedy feature in New York crime caper movie Misty Button | date = 18 August 2021 | accessdate = 28 July 2023 }} won the "best narrative feature" at the 2019 San Luis Obispo International Film Festival.{{cite web|url = http://www.iftn.ie/news/?act1=record&only=1&aid=73&rid=4292615&tpl=archnews&force=1 | website = iftn.ie | title = Irish-American Feature Film 'Misty Button' Wins Best Narrative Feature Award on St. Patrick's Day | date = 20 March 2019 | accessdate = 28 July 2023 }}

In 2021, he filmed a Sky Studios series titled Then You Run,{{cite web|url = https://www.presseportal.de/pm/33221/5001685 | website = presseportal.de | publisher = News aktuell GmbH | title = Dreharbeiten des Sky Original "Then You Run" haben begonnen | language = de | date = 24 August 2021 | accessdate = 24 September 2022 }} which was released in July 2023.{{cite web|url = https://www.independent.ie/entertainment/i-was-screaming-at-people-online-coked-off-my-head-corkman-cillian-osullivans-journey-from-wild-child-to-tvs-hottest-new-talent/a1033129156.html | work = Irish Independent | title = 'I was screaming at people online, coked off my head': Corkman Cillian O'Sullivan's journey from wild child to TV's hottest new talent | date = 9 July 2023 | accessdate = 9 July 2023 }} As of 2022, O'Sullivan was reportedly working on a film titled The Lost Princess.{{cite web|url = https://indiewrapmag.com/film/mourad-zaoui-and-his-upcoming-role-in-the-new-action-adventure-film-the-lost-princess/ | website = indiewrapmag.com | title = Mourad Zaoui And His Upcoming Role In The New Action Adventure Film, The Lost Princess | date = 20 April 2022 | accessdate = 6 October 2023 }}

In mid-2024, he was included in the cast of the proposed third season of Star Trek: Strange New Worlds.{{cite web|url = https://www.startrek.com/en-un/news/cillian-osullivan-strange-new-worlds-korby-first-look | website = startrek.com | title = Cillian O'Sullivan Joins Star Trek: Strange New Worlds as Dr. Roger Korby | date = 27 July 2024 | accessdate = 2 October 2024 }} In 2025, O'Sullivan also appears as Devlin, an Irish gangster, in Daredevil: Born Again.{{Cite web |url=https://www.imdb.com/title/tt18923754/fullcredits/?ref_=tt_ov_st#cast |title=Daredevil: Born Again (TV Series 2025– ) - Full cast & crew - IMDb |language=en-US |access-date=2025-03-26 |website=www.imdb.com}}{{better source|reason=WP:IMDB|date=March 2025}}