The comedy-drama centres on Mavis Gray, a writer of teen literature who heads back to her hometown in a bid to win back her high school boyfriend. The only hitch? He's happily married!
Watch the Young Adult UK exclusive trailer below:
Patton Oswalt, Patrick Wilson, Elizabeth Reaser and JK Simmons are among the movie's supporting cast.
Young Adult will open in the US in December and is expected to hit UK cinemas early next year.
