Count Bobby assumes the identity and dresses of his sick aunt because they desperately need the money for chaperoning Mary, a wealthy American heiress, on her trip through Europe. Bobby falls in love with Mary, but his dress is a handicap.
| Actor | Role |
|---|---|
 Peter AlexanderGraf Bobby Pinelski | Graf Bobby Pinelski |
 Gunther PhilippBaron Mucki von Kalk | Baron Mucki von Kalk |
 Vivi BachMary Piper | Mary Piper |
 Bill RamseyBill | Bill |
 Fritz MuliarJosef Powidel, Wiener Gangster | Josef Powidel, Wiener Gangster |
 Susi NicolettiMrs. Evelyn Piper | Mrs. Evelyn Piper |
 Hubert von MeyerinckMr. Cower | Mr. Cower |
 Rolf OlsenPräsident Eisenbauer | Präsident Eisenbauer |
| BBoy GobertSlippery | Slippery |
 Oskar SimaDonald Piper | Donald Piper |
 Alma SeidlerMadame Lussac | Madame Lussac |
| CC.W. FernbachDr. Kajetan | Dr. Kajetan |
| SSieglinde ThomasTelefonistin | Telefonistin |
 Adrienne GessnerGräfin Henriette von Ratzeberg | Gräfin Henriette von Ratzeberg |
 Raoul RetzerBarkeeper | Barkeeper |
| RRose Renée RothSchlossbesucherin | Schlossbesucherin |
| EElisabeth StieplSchlossbesucherin | Schlossbesucherin |
 Dany SigelFlugbegleiterin | Flugbegleiterin |