My Bloody Valentine (film)

My Bloody Valentine is a 1981 Canadian slasher film directed by George Mihalka and written by John Beaird, from a story by Stephen Miller. The film stars Paul Kelman, Lori Hallier, and Neil Affleck. It follows young adults in a mining town who plan a Valentine's Day party despite warnings tied to a local legend about a murderous miner.

Produced and shot in 1980, the film was filmed on location in Sydney Mines, Nova Scotia. Paramount Pictures acquired North American distribution and released it theatrically in February 1981. It grossed $5.7 million at the box office. Reviews were mixed, with some critics singling out the mine setting and cinematography and others criticizing its violence and similarities to other slasher films of the period.

The film is also known for censorship disputes: the MPAA required substantial cuts for an R rating, with several minutes of gore removed from the original release. A 2009 Lionsgate home-media release restored roughly two-and-a-half minutes of previously missing footage, though a fully uncut version remains unreleased. A remake, My Bloody Valentine 3D, was released in 2009.