Muggs McGinnis
Leo Gorcey
Danny Breslin
Bobby Jordan
Mrs. Brady
Martha Wentworth
Cop at Prizefight with the Lieutenant
Jack Mulhall
Slats Morrison
Eddie Foster
Dorgan
Dennis Moore
Henchman Dutch
Tony Carson
Muggs' Trainer
Pat Costello
Police Lieutenant
Dick Ryan
Johnny Ryan, Muggs' opponent (uncredited)
Bill Cartledge
Head of Reform School (uncredited)
Minerva Urecal
Henchman Nick (uncredited)
Jack Chefe
Limpy
Huntz Hall
Milkman George (uncredited)
Jack Carr
Officer Tom Brady
Warren Hull
Mary Breslin
Charlotte Henry
Clancy
Keye Luke
Monk Martin
Bobby Stone
Skinny, red-haired kid
Donald Haines
Scruno
Sunshine Sammy Morrison
PeeWee
David Gorcey
Writer
Carl Foreman
Producer
Sam Katzman
Director
Wallace Fox
Story
Donn Mullahy
Editor
Robert Golden
Set Decoration
Fred Preble
Production Manager
Ed W. Rote
Brendan Wood
Screenplay
Sam Robins
Pete Mayer
Director of Photography
Marcel Le Picard
Music Director
Johnny Lange
Lew Porter
Original Music Composer
Assistant Director
Harry M. Slott
Arthur Hammond
Sound
Glen Glenn