 Henry FondaWilliam Russell | William Russell |
 Cliff RobertsonJoe Cantwell | Joe Cantwell |
 Edie AdamsMabel Cantwell | Mabel Cantwell |
 Margaret LeightonAlice Russell | Alice Russell |
 Shelley BermanSheldon Bascomb | Sheldon Bascomb |
 Lee TracyPresident Art Hockstader | President Art Hockstader |
 Ann SothernSue Ellen Gamadge | Sue Ellen Gamadge |
 Gene RaymondDon Cantwell | Don Cantwell |
 Kevin McCarthyDick Jensen | Dick Jensen |
 Mahalia JacksonMahalia Jackson | Mahalia Jackson |
 Howard K. SmithHoward K. Smith | Howard K. Smith |
| JJohn Henry FaulkGov. T.T. Claypoole | Gov. T.T. Claypoole |
 Richard ArlenSen. Oscar Anderson | Sen. Oscar Anderson |
 Penny SingletonMrs. Claypoole (scenes deleted) | Mrs. Claypoole (scenes deleted) |
| GGeorge KirgoSpeechwriter | Speechwriter |
 George FurthTom | Tom |
| AAnne Newman BacalJanet (as Anne Newman) | Janet (as Anne Newman) |
 Mary LawrenceMrs. Merwin | Mrs. Merwin |
| HH.E. WestSen. Lazarus | Sen. Lazarus |
| MMichael MacDonaldZealot | Zealot |
| WWilliam R. EbersolGov. John Merwin | Gov. John Merwin |
| NNatalie MastersMrs. Anderson | Mrs. Anderson |
 Marie BlakeCleaning Woman (as Blossom Rock) | Cleaning Woman (as Blossom Rock) |
| BBill StoutBill Stout | Bill Stout |
 Tyler McVeyChairman | Chairman |
 Sherwood KeithDoctor | Doctor |
 Leoda RichardsConvention Attendee (uncredited) | Convention Attendee (uncredited) |
 Gore VidalDelegate (uncredited) | Delegate (uncredited) |
| JJohn AlbanBanquet Guest (uncredited) | Banquet Guest (uncredited) |
 Fred AldrichDelegate (uncredited) | Delegate (uncredited) |
