 | James Stewart Elwood P. Dowd |
 | Josephine Hull Veta Louise Simmons |
 | Peggy Dow Miss Kelly |
 | Charles Drake Dr. Sanderson |
 | Cecil Kellaway Dr. Chumley |
 | Victoria Horne Myrtle Mae Simmons |
 | Jesse White Wilson |
 | William H. Lynn Judge Gaffney (as William Lynn) |
 | Wallace Ford The Taxi Driver |
 | Nana Bryant Mrs. Hazel Chumley |
 | Grayce Mills Mrs. Ethel Chauvenet (as Grace Mills) |
 | Clem Bevans Mr. Herman Shimelplatzer |
| Harvey Himself |
 | Don Brodie Mailman (uncredited) |
 | Pat Flaherty Policeman (uncredited) |
 | Eula Guy Mrs. Johnson - Maid (uncredited) |
 | Norman Leavitt Henry Riley - Cab Driver (uncredited) |
 | Fess Parker Leslie - Chauffeur (voice) (uncredited) |
 | Maudie Prickett Elvira - Cook (uncredited) |
 | Dick Wessel Mr. Cracker (uncredited) |
| Writing | |
| Myles Connolly | Screenplay |
| Mary Chase | Theatre Play |
| Oscar Brodney | Screenplay |
Editing | |
| Ralph Dawson | Editor |
Production | |
| John Beck | Producer |
Directing | |
| Henry Koster | Director |
Camera | |
| William H. Daniels | Director of Photography |
Sound | |
| Frank Skinner | Music |
Art | |
| Russell A. Gausman | Set Decoration |
Sound | |
| Leslie I. Carey | Sound |
| Joe Lapis | Sound |
Art | |
| Nathan Juran | Art Direction |
Costume & Make-Up | |
| Bud Westmore | Makeup Artist |
Art | |
| Bernard Herzbrun | Art Direction |
Costume & Make-Up | |
| Orry-Kelly | Costume Design |
Art | |
| Julia Heron | Set Decoration |
Costume & Make-Up | |
| Joan St. Oegger | Hairstylist |
