 Richard ConteLarry O'Brien | Larry O'Brien |
 Julie AdamsSally Rousseau / Amanda Rousseau | Sally Rousseau / Amanda Rousseau |
 Richard EganPolice Lt. Bud Lennox | Police Lt. Bud Lennox |
 Henry HullPhilip Ferrara / Vincent St. Clair | Philip Ferrara / Vincent St. Clair |
 Fred ClarkSam Collyer | Sam Collyer |
 Jim BackusMitch Davis | Mitch Davis |
 Houseley StevensonJohn Miller, Studio Guard | John Miller, Studio Guard |
 Paul CavanaghRoland Paul | Roland Paul |
| KKatherine MeskillMary | Mary |
| LLouis LettieriJimmy Davis | Jimmy Davis |
 Francis X. BushmanHimself | Himself |
 Betty BlytheHerself | Herself |
 William FarnumHimself | Himself |
 Helen GibsonHerself | Herself |
 Joel McCreaJoel McCrea | Joel McCrea |
 Rico AlanizSpanish Actor (uncredited) | Spanish Actor (uncredited) |
| TTony BarrSeedy Hotel Night Clerk (uncredited) | Seedy Hotel Night Clerk (uncredited) |
 Chet BrandenburgCrew Member (uncredited) | Crew Member (uncredited) |
 Peter BroccoCharles Rodale (uncredited) | Charles Rodale (uncredited) |
| HHarris BrownMortuary Employee (uncredited) | Mortuary Employee (uncredited) |
| JJoseph BryanWaiter (uncredited) | Waiter (uncredited) |
| JJames J. CasinoAttendant (uncredited) | Attendant (uncredited) |
 William CastleHimself (uncredited) | Himself (uncredited) |
| BBing ConleyParade Spectator (uncredited) | Parade Spectator (uncredited) |
 John Crawford1st Detective (uncredited) | 1st Detective (uncredited) |
| RRussell DennisPublicity Man (uncredited) | Publicity Man (uncredited) |
 Marjorie EatonWeird-Looking Woman (uncredited) | Weird-Looking Woman (uncredited) |
 Douglas EvansDirector (uncredited) | Director (uncredited) |
 William FawcettActor as Beggar in Commissary (uncredited) | Actor as Beggar in Commissary (uncredited) |
| CCharlie GibbsDetective (uncredited) | Detective (uncredited) |
