 Robert Taylor'Killer' McCoy | 'Killer' McCoy |
 Edward ArnoldJim Cain | Jim Cain |
 Frank MorganBrian McCoy | Brian McCoy |
 Maureen O'SullivanSheila 'Shelia' Carson | Sheila 'Shelia' Carson |
 William GarganJohnny Martin | Johnny Martin |
 Lionel Stander'Happy' Lane | 'Happy' Lane |
 Jane WymanVivian | Vivian |
 Nat Pendleton'Pug' Walsh | 'Pug' Walsh |
 Charles D. BrownBill Thorne | Bill Thorne |
 Gene ReynoldsTommy McCoy, as a boy | Tommy McCoy, as a boy |
 Don 'Red' BarryPete Mariola | Pete Mariola |
 Isabel JewellMrs. Martin | Mrs. Martin |
 J. Farrell MacDonaldFather Patrick Ryan | Father Patrick Ryan |
 Donald DouglasMurray | Murray |
| RRussell CusterBoxing Match Spectator (uncredited) | Boxing Match Spectator (uncredited) |
 Paul FixJoe the Warehouse Bodyguard (uncredited) | Joe the Warehouse Bodyguard (uncredited) |
 Horace McMahonRocky Simpson (uncredited) | Rocky Simpson (uncredited) |
 Dick RichMariola's Assistant (uncredited) | Mariola's Assistant (uncredited) |
| HHenry RoquemoreStout Man in Bar (uncredited) | Stout Man in Bar (uncredited) |
 Charles SherlockReporter (uncredited) | Reporter (uncredited) |
 Dick WesselFighter at Gym (uncredited) | Fighter at Gym (uncredited) |
 Lester DorrPhotographer (uncredited) | Photographer (uncredited) |
| GGeorge FordParty Guest (uncredited) | Party Guest (uncredited) |
 Louis NatheauxMadison Square Garden Official (uncredited) | Madison Square Garden Official (uncredited) |
