Rosemary's Baby is a 1968 American psychological horror film written and directed by Roman Polanski, based on Ira Levin's 1967 novel. The film stars Mia Farrow as the titular Rosemary, a newlywed living in Manhattan who becomes pregnant, but soon begins to suspect that her neighbors have sinister intentions regarding her and her baby. The film's supporting cast includes John Cassavetes, Ruth Gordon, Sidney Blackmer, Maurice Evans, Ralph Bellamy, Patsy Kelly, Angela Dorian, and Charles Grodin in his feature film debut.