Jackie Cooper

as Chuck Brennan

Maureen O'Connor

as Nora

Kathleen Burke

as Julie Stone

Robert Emmett O'Connor

as Police Officer Rourke

Marjorie Main

as Mrs. Mary Brennan

Matty Fain

as Blackie Davis

George Cleveland

as Tim 'Flannel-Mouth' Farley

Bill Elliott

as Dr. Allan

Guy Usher

as Fog Horn Brennan aka Foggy

Paul White

as Spike, Gang Member

Robert Taylor

as Gang Member (uncredited)