Bowery Blitzkrieg

Muggs McGinnis

Danny Breslin

Limpy

Officer Tom Brady

Mary Breslin

Clancy

Monk Martin

Skinny, red-haired kid

Scruno

PeeWee

Mrs. Brady

Cop at Prizefight with the Lieutenant

Slats Morrison

Dorgan

Henchman Dutch

Muggs' Trainer

Police Lieutenant

Johnny Ryan, Muggs' opponent (uncredited)

Head of Reform School (uncredited)

Henchman Nick (uncredited)

Milkman George (uncredited)