Heavy Metal is a 1981 Canadian-American adult animated science 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.