Raoul Walsh Director Jack Benny Athanael Actor Alexis Smith Elizabeth Actor Guy Kibbee Radio Director , The Chief Actor Dolores Moran Violinist , Fran Blackstone Actor Allyn Joslyn Second Trumpeter , Osidro Actor Reginald Gardiner Composer , Archie Dexter Actor John Alexander First Trumpeter , Doremus Actor Franklin Pangborn Radio Engineer , Sloan Actor Margaret Dumont Mme. Traviata , Miss Rodholder Actor Robert Blake Junior Pulplinsky Actor Ethel Griffies Lady Stover Actor Paul Harvey Hotel Manager Thompson Actor Mike Mazurki Bass Player , Humphrey Rafferty Actor Murray Alper Tony Actor Mark Hellinger Producer Jack L. Warner Executive Producer Sam Hellman Screenwriter James V. Kern Screenwriter Franz Waxman Original Music Sidney Hickox Cinematographer Irene Morra Film Editing Hugh Reticker Art Director Clarence Steensen Set Decoration Milo Anderson Costume Design