Thank Your Lucky Stars (1943)

Practically everybody on the Warner Bros. lot shows up in the wartime morale-boosting musical extravaganza Thank Your Lucky Stars.  The one hour radio broadcast has pretty much the same cast as the film.

 Eddie Cantor, Dinah Shore, Bette Davis, Joan Leslie, Humphrey Bogart, Dennis Morgan, Olivia de Havilland, Edward Everett Horton, Errol Flynn