 Victor MatureNick Bianco | Nick Bianco |
 Brian DonlevyAssistant D.A. Louis D'Angelo | Assistant D.A. Louis D'Angelo |
 Coleen GrayNettie Cavallo | Nettie Cavallo |
 Richard WidmarkTommy Udo | Tommy Udo |
 Taylor HolmesEarl Howser | Earl Howser |
 Howard SmithWarden | Warden |
 Karl MaldenSgt. William Cullen | Sgt. William Cullen |
 Anthony Ross'Big Ed' Williams (uncredited) | 'Big Ed' Williams (uncredited) |
 Robert AdlerDetective (uncredited) | Detective (uncredited) |
| RRollin BauerSing Sing Guard (uncredited) | Sing Sing Guard (uncredited) |
 Harry BellaverBull Weed (uncredited) | Bull Weed (uncredited) |
| DDennis BohanGuard (uncredited) | Guard (uncredited) |
| NNina BorgetCashier (uncredited) | Cashier (uncredited) |
 Susan CabotRestaurant Patron (uncredited) | Restaurant Patron (uncredited) |
| AAlexander CampbellTrain Conductor (uncredited) | Train Conductor (uncredited) |
 Harry CarterDetective (uncredited) | Detective (uncredited) |
 Dort ClarkMan in Car (uncredited) | Man in Car (uncredited) |
| EEva CondonNun at Orphanage (uncredited) | Nun at Orphanage (uncredited) |
| HHarry CookeTaxi Driver (uncredited) | Taxi Driver (uncredited) |
| HHarold CraneMr. Moremann (uncredited) | Mr. Moremann (uncredited) |
| JJames DoodySing Sing Guard (uncredited) | Sing Sing Guard (uncredited) |
 Mildred DunnockMrs. Rizzo (uncredited) | Mrs. Rizzo (uncredited) |
| AArthur Foran Jr.Sing Sing Guard (uncredited) | Sing Sing Guard (uncredited) |
| DDavid FrescoWaiter (uncredited) | Waiter (uncredited) |
| HHarold GaryDoorman (uncredited) | Doorman (uncredited) |
| DDon GiovanniTommy's Henchman (uncredited) | Tommy's Henchman (uncredited) |
| MMarilee GrassiniRosaria (uncredited) | Rosaria (uncredited) |
| JJames Charles J.C. HeardJazz Drummer (uncredited) | Jazz Drummer (uncredited) |
 Eda HeinemannMrs. Keller (uncredited) | Mrs. Keller (uncredited) |
| LLou HerbertPoliceman (uncredited) | Policeman (uncredited) |
