- Marilyn Monroe
- Sugar Kane Kowalczyk
- Tony Curtis
- Joe / Josephine / Shell Oil Junior
- Jack Lemmon
- Jerry / Daphne
- George Raft
- Spats Colombo
- Pat O'Brien
- Detective Mulligan
- Joe E. Brown
- Osgood Fielding III
- Nehemiah Persoff
- Little Bonaparte
- Joan Shawlee
- Sweet Sue
- Billy Gray
- Sig Poliakoff
- George E. Stone
- Toothpick Charlie
- Dave Barry
- Bienstock
- Mike Mazurki
- Spats' Henchman
- Harry Wilson
- Spats' Henchman
- Beverly Wills
- Dolores
- Barbara Drew
- Nellie
- Edward G. Robinson Jr.
- Johnny Paradise
- Sam Bagley
- Minor Role
- Brandon Beach
- Party Guest
- Phil Bloom
- Gangster at Convention
- Willie Bloom
- Gangster at Convention
- Al Breneman
- Bellhop
- Steve Carruthers
- Hotel Guest
- James J. Casino
- Gangster at Convention
- Noble 'Kid' Chissell
- Police Officer
- Beulah Christian
- Speakeasy Patron
- Ted Christy
- Gangster
- Robert Cole
- Club Patron
- Marian Collier
- Olga
- Pat Comiskey
- Spats' Henchman
- Bing Conley
- Gangster at Convention
- Paul Cristo
- Gangster at Convention
- Harry Denny
- Retirement Home Resident
- Jimmy Dime
- Gangster Convention Greeter
- Franklyn Farnum
- Party Guest
- Joan Fields
- Band Member
- Duke Fishman
- Gangster at Convention
- Bess Flowers
- Party Guest
- Mary Foley
- Band Member
- George Ford
- Police Officer
- Paul Frees
- Funeral Director / Speakeasy Waiter / Josephine (voice) (uncredited)
- Joanne Genthon
- Girl
- Bobby Gilbert
- Speakeasy Patron
- Joseph Glick
- Gangster at Convention
- Jack Gordon
- Gangster with Charlie
- Joe Gray
- Mobster at Banquet
- Stuart Hall
- Speakeasy Patron
- Sam Harris
- Hotel Guest
- Harold 'Tommy' Hart
- Official #2
- Ted Hook
- Official #1
- Shep Houghton
- Speakeasy Patron
- John Indrisano
- Waiter
- Tom Kennedy
- Bouncer
- Joseph La Cava
- Gangster at Convention
- George Lake
- Small Role
- Carl M. Leviness
- Retirement Home Resident
- King Lockwood
- Gangster at Convention
- John Logan
- Small Role
- Hank Mann
- Speakeasy Patron
- Tiger Joe Marsh
- Small Role
- Jack Mather
- Small Role
- Tipp McClure
- Spats' Henchman
- Penny McGuiggan
- Trumpet Player
- Frank McLure
- Speakeasy Patron
- Laurie Mitchell
- Mary Lou
- Joan Nicholas
- Betty
- William H. O'Brien
- Hotel Guest
- Colleen O'Sullivan
- Band Member
- Joe Palma
- Small Role
- Helen Perry
- Rosella
- Jack Perry
- Gangster at Convention
- Danny Richards Jr.
- Fresh Bellboy
- Edwin Rochelle
- Chef
- John Roy
- Police Officer
- Cosmo Sardo
- Waiter
- Scott Seaton
- Old Man
- Sammy Shack
- Commuter at Station
- Fred Sherman
- Drunk
- Carl Sklover
- Small Role
- Bert Stevens
- Speakeasy Patron
- Gloria Tennes
- Band Member
- Arthur Tovey
- Speakeasy Patron
- Sid Troy
- Gangster at Convention
- Ralph Volkie
- Gangster at Massacre
- Tito Vuolo
- Mozzarella
- Sandra Warner
- Emily
- Billy Wayne
- Small Role
- Grace Lee Whitney
- Rosella
