Leigh Jason Director Miriam Hopkins Susan "Susie" Fletcher Actor Ray Milland John O'Halloran Actor Walter Abel Karl Stevens Actor Henry Stephenson Mr. Simon Fletcher Actor Alec Craig Dermot O'Neil Actor Guinn "Big Boy" Williams Mike Malloy Actor Betty Philson Joan O'Halloran Actor Marianna Strebly Katie O'Halloran Actor Margaret Dumont Mrs. Bell-Rivington Actor Jean De Briac George Actor Ivan Lebedeff Prince Michael Actor Rafael Alcayde Prince Ivan Actor Gregory Gaye Prince Leopold Actor Richard Lane 1st Detective Actor Tom Kennedy 2nd Detective Actor James Finlayson Jailer (uncredited) Actor Allan Scott Screenwriter Edward Kaufman Producer J. Peverell Marley Cinematographer Jack Hively Film Editing Van Nest Polglase Art Director