Henry Koster Director Deanna Durbin Patricia Cardwell Actor Leopold Stokowski Self Adolphe Menjou John Cardwell Actor Alice Brady Mrs. Frost Actor Eugene Pallette John R. Frost Actor Mischa Auer Michael Borodoff Actor Billy Gilbert Garage Owner Actor Alma Kruger Mrs. Tyler Actor J. Scott Smart Marshall Actor Jed Prouty Tommy Bitters Actor Jameson Thomas Russell Actor Howard C. Hickman Johnson Actor Frank Jenks Taxi Driver Actor Christian Rub Gustave Brandstetter Actor Gerald Oliver Smith Stevens Actor Jack Mulhall Rudolph Actor James Bush Swooning Music Lover Actor Joe Pasternak Producer Charles R. Rogers Producer Bruce Manning Screenwriter Charles Kenyon Screenwriter James Mulhauser Screenwriter Charles Previn Original Music Frank Skinner Original Music Joseph A. Valentine Cinematographer Bernard W. Burton Film Editing John W. Harkrider Production Design