Roman Polanski directed the 1968 film about a woman who becomes impregnated with the spawn of Satan. After he made the film, terrible things happened to almost everyone involved in filming it.

First, the film scorer, Krzystof Komelda, fell off a cliff, then died in a coma (the same affliction that characters in the book used to kill Rosemary's suspicious friend). Then the producer William Castle was stricken with kidney stones, and while hallucinating in the hospital, he started screaming lines from the film.

And of course, in 1969, Polanski's pregnant wife Sharon Tate was murdered by the Manson Family in their home. Tate had vied for the part of Rosemary, and apparently hung around the set while it was being filmed. Soon after she was murdered, conspiracy theorists began to propose that Polanski had sacrificed his wife's baby to the devil in exchange for Hollywood success.