 Tony CurtisJoe (Josephine) | Joe (Josephine) |
 Jack LemmonJerry (Daphne) | Jerry (Daphne) |
 Marilyn MonroeSugar Kane Kowalczyk | Sugar Kane Kowalczyk |
 George RaftSpats Colombo | Spats Colombo |
 Pat O'BrienDetective Mulligan | Detective Mulligan |
 Joe E. BrownOsgood Fielding III | Osgood Fielding III |
 Nehemiah PersoffLittle Bonaparte | Little Bonaparte |
 Joan ShawleeSweet Sue | Sweet Sue |
| BBilly GraySig Poliakoff | Sig Poliakoff |
 George E. StoneToothpick Charlie | Toothpick Charlie |
 Dave BarryBeinstock | Beinstock |
 Mike MazurkiSpats' Henchman | Spats' Henchman |
 Harry WilsonSpats' Henchman | Spats' Henchman |
 Beverly WillsDolores | Dolores |
| BBarbara DrewNellie | Nellie |
 Edward G. Robinson Jr.Johnny Paradise | Johnny Paradise |
| MMary FoleyBand Member (uncredited) | Band Member (uncredited) |
| GGeorgia Joan HannanBand Member (uncredited) | Band Member (uncredited) |
| CColleen O'SullivanBand Member (uncredited) | Band Member (uncredited) |
| AAl BrenemanBellhop (uncredited) | Bellhop (uncredited) |
 Tom KennedyBouncer (uncredited) | Bouncer (uncredited) |
| EEdwin RochelleChef (uncredited) | Chef (uncredited) |
| RRobert ColeClub Patron (uncredited) | Club Patron (uncredited) |
| SSammy ShackCommuter at Station (uncredited) | Commuter at Station (uncredited) |
| FFred ShermanDrunk (uncredited) | Drunk (uncredited) |
 Sandra WarnerEmily (uncredited) | Emily (uncredited) |
| DDanny Richards Jr.Fresh Bellboy (uncredited) | Fresh Bellboy (uncredited) |
 Paul FreesFuneral Director / Waiter / Josephine (voice) (uncredited) | Funeral Director / Waiter / Josephine (voice) (uncredited) |
| TTed ChristyGangster (uncredited) | Gangster (uncredited) |
| PPhil BloomGangster at Convention (uncredited) | Gangster at Convention (uncredited) |
