Bud Abbott as Mr. Dinkel / Mr. Dinkelpuss

Lou Costello as Jack / Jack Strong

Buddy Baer as Sgt. Riley / The Giant

Dorothy Ford as Receptionist / Polly

Barbara Brown as Mrs. Strong

David Stollery as Donald Larkin

William Farnum as The King

Shaye Cogan as Eloise Larkin / Princess Eloise (Darlene)

James Alexander as Arthur / Prince Arthur / Troubador

Johnny Conrad as Dancer

Almira Sessions as Mrs. Mergatroyd (uncredited)

Mel Blanc as Farm Animals (uncredited) (voice)

Arthur Shields as Patrick the Harp (uncredited)