 Doris DayGrace LeBoy Kahn | Grace LeBoy Kahn |
 Danny ThomasGus Kahn | Gus Kahn |
 Frank LovejoyWalter Donaldson | Walter Donaldson |
 Patrice WymoreGloria Knight | Gloria Knight |
 James GleasonFred Townsend | Fred Townsend |
 Mary WickesAnna | Anna |
| JJulie OshinsJohnny Martin | Johnny Martin |
 Jim BackusSam Harris | Sam Harris |
 Minna GombellMrs. LeBoy | Mrs. LeBoy |
 Harry AntrimMr. LeBoy | Mr. LeBoy |
 William ForrestFlorenz Ziegfeld | Florenz Ziegfeld |
| BBunny LewbelIrene, at age 6 | Irene, at age 6 |
| RRobert LydenDonald, at age 8 | Donald, at age 8 |
 Mimi GibsonIrene, at age 3 | Irene, at age 3 |
 Christopher OlsenDonald, at age 4 | Donald, at age 4 |
| JJohn AlbanBenefit Guest (uncredited) | Benefit Guest (uncredited) |
| BBetty ArlenChorine (uncredited) | Chorine (uncredited) |
 Vince BarnettBurlesk Comedian (uncredited) | Burlesk Comedian (uncredited) |
 Dan BartonHollywood Producer (uncredited) | Hollywood Producer (uncredited) |
| MMary BaylessBenefit Guest (uncredited) | Benefit Guest (uncredited) |
| RRodney BellHarris' Assistant (uncredited) | Harris' Assistant (uncredited) |
| GGeorge BoyceStage Manager (uncredited) | Stage Manager (uncredited) |
| PPaul BradleyBenefit Guest (uncredited) | Benefit Guest (uncredited) |
 Chet BrandenburgStagehand (uncredited) | Stagehand (uncredited) |
| EElse BäckMrs. Kahn (uncredited) | Mrs. Kahn (uncredited) |
| FFrances CantoNurse (uncredited) | Nurse (uncredited) |
| GGeraldine CobbSecretary (uncredited) | Secretary (uncredited) |
 Tristram CoffinNightclub Maitre D' (uncredited) | Nightclub Maitre D' (uncredited) |
 Hans ConriedWilliam Rossiter (uncredited) | William Rossiter (uncredited) |
| PPaul CristoSoldier (uncredited) | Soldier (uncredited) |
