Rosemary's Baby is a 1968 American psychological horror film written and directed by the Polish director Roman Polanski, based on the bestselling 1967 novel of the same name by Ira Levin. The cast features Mia Farrow, John Cassavetes, Ruth Gordon, Ralph Bellamy, Maurice Evans, Sidney Blackmer, and Charles Grodin. The film chronicles the story of a pregnant woman who deals with the problem of her body changing to carry an unknown baby.
Rosemary's Baby earned almost universal acclaim from film critics, won numerous nominations and awards, and today is considered one of the greatest American horror films ever made. In 2014, the film was selected for preservation in the National Film Registry by the Library of Congress, being deemed "culturally, historically, or aesthetically significant."