Before he left for a brief European visit, symphony conductor Sir Alfred De Carter casually asked his staid brother-in-law August to look out for his young wife, Daphne, during his absence. August has hired a private detective to keep tabs on her. But when the private eye's report suggests Daphne might have been canoodling with his secretary, Sir Alfred begins to imagine how he might take his revenge.
Unfortunately the movie Unfaithfully Yours is not yet available on Disney Plus.
| Directing | Preston Sturges | Director |
| Writing | Preston Sturges | Screenplay |
| Production | Preston Sturges | Producer |
| Camera | Victor Milner | Director of Photography |
| Editing | Robert Fritch | Editor |
| Editing | Stuart Gilmore | Editor |
| Art | Lyle R. Wheeler | Art Direction |
| Art | Joseph C. Wright | Art Direction |
| Art | Paul S. Fox | Set Decoration |
| Art | Thomas Little | Set Decoration |
| Costume & Make-Up | Bonnie Cashin | Costume Design |
| Costume & Make-Up | Oleg Cassini | Costume Design |
| Directing | Gaston Glass | Assistant Director |
| Sound | Roger Heman Sr. | Sound |
| Sound | Arthur von Kirbach | Sound |
| Costume & Make-Up | Henry Vilardo | Makeup Artist |
