Welcome to 18

{{Infobox film

| name = Welcome to 18

| image = Welcome to 18.jpg

| caption = VHS cover

| director = Terry Carr

| producer = David C. Thomas

| screenplay = Terry Carr
Judith Sherman Wolin

| starring = Mariska Hargitay
Courtney Thorne-Smith
JoAnn Willette
Cristen Kauffman

| music = Tony Berg

| cinematography = Stephen L. Posey

| editing = Lois Freeman-Fox

| studio = Green Griffin

| distributor = American Distribution Group{{cite book|last1=Nash|first1=Jay Robert|last2=Nash|first2=Stanley Ralph|last3=Connelly|first3=Robert B.|title=The Motion Picture Guide: 1987 Annual|url=https://archive.org/details/motionpicturegui00jayr|url-access=registration|date=1987|publisher=CineBooks|isbn=0-933-99715-9|page=[https://archive.org/details/motionpicturegui00jayr/page/305 305]}}
International Video Entertainment{{cite news|title=Home Video Guide|work=The Palm Beach Post|date=June 19, 1987|location=West Palm Beach, Florida|page=200}}
Green Griffin

| released = {{film date|1986|11|14}}

| runtime = 91 minutes

| country = United States

| language = English

}}

Welcome to 18 (alternative title: Summer Release) is a 1986 American coming of age comedy-drama film directed by Terry Carr, who also wrote the screenplay with Judith Sherman Wolin. It stars Mariska Hargitay, Courtney Thorne-Smith and JoAnn Willette.{{cite book|last1=Willis|first1=John A.|title=Screen World|date=December 1, 1987|publisher=Crown|isbn=0-517-56615-X|page=[https://archive.org/details/screenworldvol3800john/page/145 145]|url-access=registration|url=https://archive.org/details/screenworldvol3800john/page/145}}