Rosemarys Baby (1968)

A young woman, innocent and religious, and her husband, ambitious and agnostic, move into a new apartment. Soon the woman is pregnant, but she begins to realize that she has fallen into a coven of witches and warlocks, and that they claim the child as the antichrist. Gripping and powerful, subtle yet utterly horrifying, with luminous performances by all. Polanski's first American film; from Levin's best-seller.