Jane Withers

Arnette Flynn

Walter Brennan

Gramp 'Hercules' Flynn

Pauline Moore

Ruth Morris

Carl Switzer

Zero

Jackie Searl

Chaunce Ralston

Berton Churchill

Edward Ralston

Douglas Fowley

Blackie Morgan

Robert Wilcox

Frank Bailey

Douglas Scott

Leon Wakefield

Lon Chaney Jr.

Dutch

Frank Melton

Barton Henshaw

Syd Saylor

Lutz

Romaine Callender

Doctor (uncredited)

Roger Gray

Engineer (uncredited)

Fred Kelsey

Policeman (uncredited)

Alfred L. Werker