 Cary GrantBarnaby Fulton | Barnaby Fulton |
 Ginger RogersEdwina Fulton | Edwina Fulton |
 Charles CoburnOliver Oxley | Oliver Oxley |
 Marilyn MonroeLois Laurel | Lois Laurel |
 Hugh MarloweHank Entwhistle | Hank Entwhistle |
 Henri LetondalJerome Kitzel | Jerome Kitzel |
 Robert CornthwaiteDr. Zoldeck | Dr. Zoldeck |
 Larry KeatingGJ Culverly | GJ Culverly |
 Douglas SpencerDr. Brunner | Dr. Brunner |
 Esther DaleMrs. Rhinelander | Mrs. Rhinelander |
 George WinslowLittle Indian | Little Indian |
| MMarjorie HollidayOxley Receptionist (uncredited) | Oxley Receptionist (uncredited) |
 Harry Carey, Jr.Reporter (uncredited) | Reporter (uncredited) |
 Nico MinardosMan at Pool (uncredited) | Man at Pool (uncredited) |
 Charlotte AustinStudent (uncredited) | Student (uncredited) |
 Harry BartellScientist (uncredited) | Scientist (uncredited) |
 Faire BinneyDowager (uncredited) | Dowager (uncredited) |
| TTex BrodusClub Patron (uncredited) | Club Patron (uncredited) |
| OOlive CareyJohnny's Mother (uncredited) | Johnny's Mother (uncredited) |
 Harry CarterScientist (uncredited) | Scientist (uncredited) |
 Melinda CaseyGirl (uncredited) | Girl (uncredited) |
| RRonnie ClarkBoy (uncredited) | Boy (uncredited) |
| RRuss ClarkPoliceman (uncredited) | Policeman (uncredited) |
 Heinie ConklinHouse Painter (uncredited) | House Painter (uncredited) |
 George EldredgeMr. Peabody (uncredited) | Mr. Peabody (uncredited) |
 Kathleen FreemanMrs. Brannigan (uncredited) | Mrs. Brannigan (uncredited) |
| TTerry GoodmanBoy (uncredited) | Boy (uncredited) |
 Dabbs GreerCabbie (uncredited) | Cabbie (uncredited) |
 Howard HawksNarrator (voice) (uncredited) | Narrator (voice) (uncredited) |
| GGeorge HoaglandClub Patron (uncredited) | Club Patron (uncredited) |
