Leo Gorcey

Muggs McGinnis

Bobby Jordan

Danny Breslin

Huntz Hall

Limpy

Warren Hull

Officer Tom Brady

Charlotte Henry

Mary Breslin

Keye Luke

Clancy

Bobby Stone

Monk Martin

Donald Haines

Skinny, red-haired kid

Sunshine Sammy Morrison

Scruno

David Gorcey

PeeWee

Martha Wentworth

Mrs. Brady

Jack Mulhall

Cop at Prizefight with the Lieutenant

Eddie Foster

Slats Morrison

Dennis Moore

Dorgan

Tony Carson

Henchman Dutch

Pat Costello

Muggs' Trainer

Dick Ryan

Police Lieutenant

Bill Cartledge

Johnny Ryan, Muggs' opponent (uncredited)

Minerva Urecal

Head of Reform School (uncredited)

Jack Chefe

Henchman Nick (uncredited)

Jack Carr

Milkman George (uncredited)