Black Christmas (also released under the titles Silent Night, Evil Night, and Stranger in the House[1][2]) is a 1974 Canadian independent horror film 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 follows a group of sorority sisters who are stalked and murdered during the holiday season, by a killer hiding in their sorority house. It was inspired by a series of murders that took place in the Westmount section of Montreal, in the province Quebec, Canada.