Her first notable film role came in 2004, with the dark drama Lightning Bug with Bret Harrison, Kevin Gage and Ashley Laurence.
Branching into other arenas than acting, Prepon also served as executive producer of the film.
Prepon co-starred with Bryan Greenberg as Hannah Daniels the ABC drama October Road, which debuted March 15, 2007.
She also co-starred in the romantic comedy Slackers, which is about three best friends trying to scam their way through college who eventually get caught.
In 2001, she got her first chance in front of a movie camera in Steve Hanft's musical comedy Southlander with Beck, Beth Orton and Hank Williams III, where she played Seven=Five, a young TV telepathic.
Laura Helene Prepon (born March 7, 1980) is an American actress, producer, and author.
She is known for her role as Donna Pinciotti in all eight seasons of the Fox sitcom That '70s Show (1998–2006), and for her role as Alex Vause in the Netflix original comedy-drama series Orange Is the New Black (2013–present).
Following That '70s Show, Prepon worked mainly in television.She appeared in the film adaptation of Paula Hawkins's novel The Girl on the Train.