Black Christmas is a 1974 Canadian psychological slasher film produced and directed by Bob Clark, and written by A. Roy Moore. It stars Olivia Hussey, Keir Dullea, Margot Kidder, Andrea Martin, Marian Waldman and John Saxon. The story centers on a group of sorority sisters who are receiving threatening phone calls, while being stalked and murdered during the holiday season by a deranged murderer.