Trivia

According to Mia Farrow, the scenes where Rosemary walks in front of traffic were spontaneous and genuine. Roman Polanski is reported to have told her that "nobody will hit a pregnant woman." The scene was successfully shot with Farrow walking into real traffic and Polanski following, operating the hand-held camera since he was the only one willing to do it.

Mia Farrow ate raw liver for a scene in the movie despite being a vegetarian at the time.

Mia Farrow does the vocals on the title-sequence lullaby.

Ira Levin felt that this film is "the single most faithful adaptation of a novel ever to come out of Hollywood." William Castle speculated the reasons for this were because it was the first time Roman Polanski had ever adapted another writer's work, unaware he had the freedom to improvise on the book.

The original cut ran over four hours. Roman Polanski couldn't decide what to cut so he let editor Sam O'Steen decide. Sam would later direct the sequel Look What's Happened to Rosemary's Baby (1976).

William Castle: man near phone booth is the film's producer.