Young conductor Roberto Lombardini has never known his father who is actually a former musician, a failed piano player who has sunk into alcoholism.
| Actor | Role |
|---|---|
 Jean MaraisLorenzo Lombardi | Lorenzo Lombardi |
 Jacqueline PorelLucienne Lombardi | Lucienne Lombardi |
 Roberto BenziRoberto Lombardi | Roberto Lombardi |
 Édouard DelmontM. Galibert | M. Galibert |
 Charles DechampsMonsieur Roze | Monsieur Roze |
 Fernand SardouDottore Aldo Guarneri | Dottore Aldo Guarneri |
 Georgette AnysLa grosse Lolo | La grosse Lolo |
| GGermaine PapeMme Torquato | Mme Torquato |
 Jean LanierCrespi, l'ami | Crespi, l'ami |
| MMarcel LebasLe facteur | Le facteur |
 Fernand RauzénaM. Torquato | M. Torquato |
 Philippe RichardLe directeur | Le directeur |
 Julien VerdierDupont, le musicien | Dupont, le musicien |
 Léon WaltherCount Amadeo, le critique | Count Amadeo, le critique |
| RRenée DevillersGermaine Obrecht | Germaine Obrecht |
| NNikita MagaloffNot listed | Not listed |
| RRené Brun(uncredited) | (uncredited) |
 Dominique Marcas(uncredited) | (uncredited) |
 Jackie Sardou(uncredited) | (uncredited) |