Nicky and Vicky, two librettists who also happen to be brothers, are presently in collaboration with composer Toni. All too aware of Toni's amorous escapades, Nicky and Vicky try to keep the existence of their pretty sister Hedi a secret. Suffering from an acute case of writers' block (he has yet to find an inspiration for his next production), Toni throws a huge party, which is boycotted by his friends and associates so that he'll keep his mind on his work.
| Actor | Role |
|---|---|
 Walter JanssenToni Hofer - ein Operettenkomponist | Toni Hofer - ein Operettenkomponist |
 Oskar KarlweisNicky Mahler - Librettist | Nicky Mahler - Librettist |
 Willi ForstVicky Mahler - Librettist | Vicky Mahler - Librettist |
 Gretl TheimerHedi | Hedi |
 Irene EisingerAnni Lohmeier | Anni Lohmeier |
 S.Z. SakallDer Theaterdirektor | Der Theaterdirektor |
 Karl EtlingerDer Kassierer Schlesinger | Der Kassierer Schlesinger |
 Paul HörbigerFerdinand - ein Kutscher | Ferdinand - ein Kutscher |
 Tibor von HalmayDer Komiker | Der Komiker |
| AAugust VockauWeigl - Faktotum bei Hofer | Weigl - Faktotum bei Hofer |
 Paul MorganNotar Novotny | Notar Novotny |
| GGert BloemFranz Schubert | Franz Schubert |
| IImre LászlóKocsmáros | Kocsmáros |