 | Bud Abbott als Mr. Dinkel / Mr. Dinkelpuss |
 | Lou Costello als Jack / Jack Strong |
 | Buddy Baer als Sgt. Riley / The Giant |
 | Dorothy Ford als Receptionist / Polly |
 | Barbara Brown als Mrs. Strong |
 | David Stollery als Donald Larkin |
 | William Farnum als The King |
 | Shaye Cogan als Eloise Larkin / Princess Eloise (Darlene) |
| James Alexander als Arthur / Prince Arthur / Troubador |
| Johnny Conrad als Dancer |
 | Almira Sessions als Mrs. Mergatroyd (uncredited) |
 | Mel Blanc als Farm Animals (uncredited) (voice) |
 | Arthur Shields als Patrick the Harp (uncredited) |
| Jean Yarbrough | Director |
| Nathaniel Curtis | Screenplay |
| Pat Costello | Story |
| George Robinson | Director of Photography |
| Heinz Roemheld | Original Music Composer |
| Alex Gottlieb | Producer |
| Pat Costello | Executive Producer |
| Lou Costello | Producer |
| Otho Lovering | Editor |
| McClure Capps | Art Direction |
| Fred M. MacLean | Set Decoration |
| Abe Haberman | Makeup Artist |
| Lillian Shore | Hairstylist |
| Carl Lee | Special Effects |
| Jack R. Glass | Visual Effects |
| Raoul Kraushaar | Music Supervisor |
| Lester Lee | Songs |
| Bob Russell | Songs |
