Daredevil Jack is a 1920 American silent action film serial directed by W. S. Van Dyke and starring heavyweight champion Jack Dempsey. An incomplete copy of the film is housed in the UCLA Film and Television Archive. The supporting cast features Lon Chaney, Edgar Kennedy, and Bull Montana. This was the first of 23 films, many of them short subjects, in which the iconic boxer Dempsey appeared, usually as the top-billed leading man.