Leo Gorcey

Muggs McGinnis

Bobby Jordan

Danny Breslin

Warren Hull

Officer Tom Brady

Huntz Hall

Limpy

Keye Luke

Clancy

Charlotte Henry

Mary Breslin

Bobby Stone

Monk Martin

Sunshine Sammy Morrison

Scruno

David Gorcey

PeeWee

Donald Haines

Skinny, red-haired kid

Martha Wentworth

Mrs. Brady

Pat Costello

Muggs' Trainer

Dennis Moore

Dorgan

Tony Carson

Henchman Dutch

Bill Cartledge

Johnny Ryan, Muggs' opponent

Dick Ryan

Police Lieutenant

Minerva Urecal

Head of Reform School

Jack Chefe

Henchman Nick

Jack Carr

Milkman George

Jack Mulhall

Cop at Prizefight with the Lieutenant

Eddie Foster

Slats Morrison