 | Tony Curtis als Joe Martini |
 | Gilbert Roland als Sylvio Malatesta |
 | Marisa Pavan als Anna Malatesta |
 | Jay C. Flippen als Sgt. Jack Gillen |
 | Argentina Brunetti als Mama Malatesta |
 | Ted de Corsia als Lt. Kilrain |
 | Richard Monda als Pietro "Peanuts" Malatesta |
 | Kathleen Freeman als Rosa Cuneo |
 | Herb Vigran als Charlie Cuneo |
 | Peggy Maley als Veda Pinelli |
 | John Cliff als Father Giuseppe |
 | Russ Conway als Det. Sgt. Sommers |
 | Chico Vejar als Frankie Pellatrini |
 | Tito Vuolo als Grocer |
| Helen Wallace als Mother Catherine |
| James Hyland als Frank Wilkins |
 | Bobby Barber als Party Guest (uncredited) |
 | Richard Benedict als Pool Player (uncredited) |
 | Audrey Betz als Party Guest (uncredited) |
| Nina Borget als Party Guest (uncredited) |
 | Chet Brandenburg als Counterman (uncredited) |
| Mary Chan als Restaurant Patron (uncredited) |
| Spencer Chan als Restaurant Patron (uncredited) |
| W.T. Chang als Restaurant Patron (uncredited) |
| Paul Cristo als Party Guest (uncredited) |
 | James Dime als Diner Patron (uncredited) |
| Sam Finn als Boxing Match Spectator (uncredited) |
| Raoul Freeman als Chaperone at Dance (uncredited) |
| Joe Garcio als Party Guest (uncredited) |
 | Chuck Hamilton als Cop (uncredited) |
| John Indrisano als Card Player (uncredited) |
| David Leonard als Father Tomasino (uncredited) |
| Tom McDonough als Doctor (uncredited) |
| Tina Menard als Party Guest (uncredited) |
| Ernesto Molinari als Party Guest (uncredited) |
| Ralph Montgomery als Reporter (uncredited) |
| Anton Northpole als Party Guest (uncredited) |
| Emma Palmese als Party Guest (uncredited) |
| Jean Ransome als Chaperone at Dance (uncredited) |
 | Chris Robinson als Boy at Dance (uncredited) |
| Edwin Rochelle als Diner Patron (uncredited) |
| Victor Romito als Party Guest (uncredited) |
| Tony Roux als Card Player (uncredited) |
| Stephen Soldi als Card Player (uncredited) |
| Owen Song als Waiter (uncredited) |
 | Hal Taggart als Chaperone at Dance (uncredited) |
| Rodger Terry als Chaperone at Dance (uncredited) |
| Theresa Testa als Party Guest (uncredited) |
 | Sammee Tong als Restaurant Proprietor (uncredited) |
 | Joe Turkel als Lothario at Dance (uncredited) |
 | Philip Van Zandt als Vince de Paul (uncredited) |
| Renata Vanni als Señora Betgatina (uncredited) |
| Paul Weber als Doctor (uncredited) |
| Joseph Pevney | Director |
| Edwin Blum | Screenplay |
| Edwin Blum | Story |
| Robert Arthur | Producer |
| Russell Metty | Director of Photography |
| Ted J. Kent | Editor |
| Max Nippell | Gaffer |
| Roy Vaughn | Assistant Camera |
| Henry Janssen | Sound |
| Hans J. Salter | Music |
| Henry Vars | Music |
| Alexander Golitzen | Art Direction |
| Eric Orbom | Art Direction |
| Russell A. Gausman | Set Decoration |
| Ray Jeffers | Set Decoration |
| Bill Thomas | Costume Design |
| Joan St. Oegger | Hairstylist |
| Bud Westmore | Makeup Artist |
| Mark Reedall | Makeup Artist |
| Merle Reeves | Hairstylist |
| Lew Leary | Unit Production Manager |
| Foster Thompson | Assistant Production Manager |
| Joseph E. Kenney | Assistant Director |
| Wilbur Mosier | Assistant Director |
| Bernard Wiesen | Assistant Director |
| Walter Hammond | Props |
| Solly Martino | Props |
| William Nunley | Props |
| Jack Gereghty | Still Photographer |
| Ledge Haddow | Assistant Camera |
| Philip H. Lathrop | Camera Operator |
| Phil Benjamin | Casting Assistant |
| Claire Cramer | Wardrobe Coordinator |
| Nevada Penn | Wardrobe Coordinator |
| Stanley Kallis | Assistant Editor |
| Joseph Gershenson | Music Supervisor |
| Irving Gertz | Music |
| Henry Mancini | Music |
| Frank Skinner | Music |
| Herman Stein | Music |
| Adele Cannon | Script Supervisor |
| Charles Baqueta | Production Coordinator |
| Leon Charles | Dialogue Coach |
