Heavy Metal is a 1981 Canadian adult animated sci-fi-fantasy film directed by Gerald Potterton, produced by Ivan Reitman and Leonard Mogel, who also was the publisher of Heavy Metal magazine, which was the basis for the film, and starring the voices of Rodger Bumpass, Jackie Burroughs, John Candy, Joe Flaherty, Don Francks, Martin Lavut, Marilyn Lightstone, Eugene Levy, Alice Playten, Harold Ramis, Percy Rodriguez, Susan Roman, Richard Romanus, August Schellenberg, John Vernon, and Zal Yanovsky. The screenplay was written by Daniel Goldberg and Len Blum.
The film is an anthology of various science fiction and fantasy stories adapted from Heavy Metal magazine and original stories in the same spirit. Like the magazine, the film features a great deal of graphic violence, sexuality, and nudity. Its production was expedited by having several animation houses working simultaneously on different segments.