Crazy House (1943)
Crazy House is a 1943 comedy film starring Ole Olsen and Chic Johnson as Broadway stars who return to Universal Studios to make another movie. The mere mention of Olsen and Johnson's names evacuates the studio and terrorizes the management and personnel. Undaunted, the comedians hire an assistant director and unknown talent, and set out to make their own movie. Financed by an eccentric "angel" (Percy Kilbride), the completed feature is set to premiere when angry creditors confiscate most of the film. Olsen and Johnson keep the preview going, anyway, and their venture is a success.
More at Wikipedia.