Dennis O'Keefe
— Barry Amsterdam
Abbe Lane
— Connie Peters
Paul Stewart
— Arnold 'Arnie' Valent
Allison Hayes
— Joyce Kern, Alias Sue Morton
Xavier Cugat
— Benny Chico
Richard H. Cutting
— David Healey
Chris Alcaide
— Nate
William Challee
— Dolan
Carroll McComas
— Mother Valent (uncredited)
Hugh Sanders
— Pat Winters
John Zaremba
— Robert Fenton
George Brand
— Jack Roper
Hortense Petra
— Cleo Allen (uncredited)
Al Capone
— Al Capone (archive footage) (uncredited)
Steve Carruthers
— Gambler (uncredited)
Franklyn Farnum
— Nightclub Patron (uncredited)
Bess Flowers
— Gambler (uncredited)
Gil Frye
— Tony (uncredited)
Robert Haines
— Party Guest (uncredited)
Charles Horvath
— Hugo (uncredited)
Jack Kenney
— Crowd Member at Murder Scene (uncredited)
Tyler McVey
— Henderson (uncredited)
Joseph Mell
— Markey (uncredited)
Harold Miller
— Fight Spectator (uncredited)
Joe Ploski
— Street Passerby / Party Guest (uncredited)
Cosmo Sardo
— Nightclub Patron / Party Guest (uncredited)
Carl Sklover
— Reporter on Murder Scene (uncredited)
Bert Stevens
— Nightclub Patron (uncredited)
Mark Hanna
— Brad Lacy (uncredited)