Hello Mary Lou: Prom Night II is a 1987 Canadian supernatural slasher film directed by Bruce Pittman, written by Ron Oliver, and starring Michael Ironside, Wendy Lyon, Louis Ferreira, and Lisa Schrage. It follows Vicki Carpenter, a high school student who becomes possessed by Mary Lou Maloney, a student who died at her high school prom in 1957. A sequel to the slasher film Prom Night (1980), it was originally intended to be a standalone film titled The Haunting of Hamilton High, but was retitled in order to capitalize on the success of the original Prom Night. The only story connection between the two films is that they are set at the same high school. Both films were executive produced by Peter R. Simpson.