Gino Fabretti is a famous Italian tenor. During a tour in Nice, he begins a relationship with the wife of a renowned doctor. The doctor traps and drugs him and replaces his vocal cords with those of Robert, a delivery boy in a grocery store. Robert wakes up with the voice of Gino and Gino with that of Robert (including accents and mannerisms!). The unfaithful wife despises the tenor without his voice and becomes more interested in the grocer.
| Actor | Role |
|---|---|
 Luis MarianoGino Fabretti | Gino Fabretti |
 Julien CaretteRobert | Robert |
 Noël RoquevertLe docteur Renault | Le docteur Renault |
 Arlette MerryGisèle | Gisèle |
 Marcel DelaîtreDoniol | Doniol |
| JJacqueline RomanJeannette | Jeannette |
 Robert ArnouxBarette | Barette |
 Jean GavenJack Bing | Jack Bing |
| LLouis LionsL'assistant | L'assistant |
 Pierre LabryL'agent | L'agent |
 Jean-François MartialLe livreur | Le livreur |
| JJenny LeducLa bonne du docteur | La bonne du docteur |
| LLyska WellsLa bonne de Fabretti | La bonne de Fabretti |
| DDanière FranconvilleNot listed | Not listed |
| FFlore MathieuNot listed | Not listed |
 Clément BairamNot listed | Not listed |