 | William Powell als Mr. Peabody |
 | Ann Blyth als Mermaid |
 | Irene Hervey als Mrs. Polly Peabody |
 | Andrea King als Cathy Livingston |
 | Clinton Sundberg als Mike Fitzgerald |
 | Art Smith als Dr. Harvey |
 | Hugh French als Major Hadley |
 | Beatrice Roberts als Mother |
 | Lumsden Hare als Col. Mandrake |
 | Mary Field als Wee Shop Clerk |
 | Cynthia Corley als Nurse |
| Frederick Clarke als Basil |
| Irving Pichel | Director |
| Guy Jones | Novel |
| Nunnally Johnson | Screenplay |
| Ruby R. Levitt | Set Decoration |
| Carmen Dirigo | Hairstylist |
| Grace Houston | Costume Design |
| Russell A. Gausman | Set Decoration |
| Marjorie Fowler | Editor |
| Boris Leven | Art Direction |
| Bud Westmore | Makeup Artist |
| Fred Frank | Assistant Director |
| Bernard Herzbrun | Art Direction |
| Nunnally Johnson | Producer |
| Russell Metty | Director of Photography |
| Robert Emmett Dolan | Original Music Composer |
| Julia Marcia Davies | Script Supervisor |
| Maurice Goldberg | Still Photographer |
| Philip H. Lathrop | Camera Operator |
