Movie Movie (1978)
Movie Movie is a 1978 American double bill directed by Stanley Donen. It consists of two films, Dynamite Hands, a boxing ring morality play, and Baxter's Beauties of 1933, a musical comedy, both starring the husband-and-wife team of George C. Scott and Trish Van Devere. A fake trailer for a flying-ace movie set in World War I (also starring Scott) is shown between the double feature.
More at Wikipedia.