Freddie Bartholomew

as Freddie Hewlett

Billy Halop

as James 'Jimmie' Fletcher

Huntz Hall

as Bushy Thomas

Bobby Jordan

as Jockey

Boyd Davis

as Maj. E.C. Carter - Academy Commandant

William Blees

as Cadet Capt. Wesley Rogers

Richard Noyes

as Cadet Sgt. Sable

Joseph Crehan

as Mr. Jeffrey Ferguson

Don Beddoe

as Saginaw Jake

Charles Lind

as Cadet Pell

Billy Lechner

as Cadet Baker

Peter Lawford

as Cadet Wilbur

Rudolph Anders

as Horner - Nazi Saboteur (as Robert O. Davis)