Rosemary's Baby (1968)

Cute and perky Rosemary Woodhouse (Mia Farrow) and husband Guy (John Cassavetes), an aspiring actor, move into an elegant NYC apartment building where they make the acquaintance of solicitous neighbor Minnie Castevet (Ruth Gordon, in an Oscar-winning performance) and her husband Roman (Sidney Blackmer). Rosemary comes to suspect that all is not right with this new setting or her new neighbors;