Little Sister(1992)
OVERVIEW
Bobby is a college freshman and as part of a fraternity prank, he poses as Roberta and becomes pledged into a sorority. There he falls madly in love with Diana. As the game escalates, Bobby finds it increasingly hard to keep his twin identities separate...
TAGLINE:
To get to Diana . . . Bobby had to create Roberta . . . now he's her . . . LITTLE SISTER