Serenade represented the return to the screen of international favorite Lillian Harvey after an absence of two years. Based loosely on the life of composer Franz Schubert, the film casts Bernard Lancret as Schubert, Harvey as his dancer sweetheart, and Louis Jouvet as a possessive Baron who has his own designs on our heroine.
| Actor | Role |
|---|---|
 Lilian HarveyMargaret Brenton | Margaret Brenton |
 Louis JouvetLe baron Hartmann | Le baron Hartmann |
 Bernard LancretFranz Schubert | Franz Schubert |
 Félix OudartSchwindt, le directeur | Schwindt, le directeur |
 Roger BourdinVogl | Vogl |
 Marcel LupoviciL'ami de Schubert | L'ami de Schubert |
 Auguste BovérioBeethoven | Beethoven |
| MMarcel ValléeHostlinger, le editeur | Hostlinger, le editeur |
 Alexandre RignaultLe gendarme | Le gendarme |
 Pierre MagnierLe Prince Metternich | Le Prince Metternich |
| RRené SternUn élégant | Un élégant |
| MMadeleine SuffelAnny | Anny |
 Claire GérardLa propriétaire | La propriétaire |
 Marthe MellotLa vendeuse | La vendeuse |
 Georges BeverLe commis | Le commis |
 Jacques ButinLe secrétaire | Le secrétaire |
 Edmond CastelL'aubergiste | L'aubergiste |
 Philippe RichardLe prieur | Le prieur |
| AAndré VolnayNot listed | Not listed |
| GGeorges SerranoNot listed | Not listed |
 Marc DantzerNot listed | Not listed |
 Robert ArnouxChavert | Chavert |
 Henri RichardUn diplomate | Un diplomate |