Keep It Up, Jack is a 1974 British sex comedy film directed by Derek Ford and produced by Michael L. Green. Jack James (Mark Jones), an unsuccessful music hall entertainer and drag artist, inherits a brothel from his late aunt, and impersonates her in order to seduce the female clients. The film also exists in a version with hardcore inserts, but there is no suggestion that any of the credited cast participated in it. In January 2022 it was announced that Dark Force Entertainment will release the longer, hardcore version of the film on blu-ray.