Heavy Metal is a 1981 Canadian-American adult animated anthology science fiction fantasy film directed by Gerald Potterton and produced by Ivan Reitman and Leonard Mogel, who also was the publisher of Heavy Metal magazine, the basis for the film. The screenplay was written by Daniel Goldberg and Len Blum. The film was the sixth animated feature film to be presented in Dolby surround sound. A sequel titled Heavy Metal 2000 was released in 2000.