Famous 1930's tenor Jan Kiepura doubles as a singing shop-assistant who stands in for a famous but lazy singer, mixing up each others love-lives in the process.
| Actor | Role |
|---|---|
 Jan KiepuraJan Morena & Edi Jaworski | Jan Morena & Edi Jaworski |
 Theo LingenHans Heinz Hinz | Hans Heinz Hinz |
 Lien DeyersSusi | Susi |
 Adele SandrockFürstin Loridowska | Fürstin Loridowska |
 Rudolf PlatteBernhard, Gardrobier | Bernhard, Gardrobier |
 Fritz ImhoffSebastian Weismaier | Sebastian Weismaier |