An Austrian prince hatches a plan to keep his rival, the Russian czar, busy by keeping him surrounded by beautiful women and away from the negotiating table. The Czar, however, has his own plan—he hires a man who is his exact double to impersonate him and confuse the Austrians by appearing to be everywhere at once. In addition, both the Czar and his double fall for the same woman.
| Actor | Role |
|---|---|
 Lilian HarveyChristel Weinzinger | Christel Weinzinger |
 Willy FritschZar Alexander von Russland / Uralsky | Zar Alexander von Russland / Uralsky |
 Otto WallburgBibikoff, sein Adjutant | Bibikoff, sein Adjutant |
 Conrad VeidtFürst Metternich | Fürst Metternich |
| CCarl-Heinz SchrothPepi, sein Sekretär | Pepi, sein Sekretär |
 Lil DagoverKomtesse | Komtesse |
 Alfred AbelKönig von Sachsen | König von Sachsen |
 Adele SandrockFürstin | Fürstin |
 Paul HörbigerHeurigensänger | Heurigensänger |
 Eugen RexSächsischer Gesandter | Sächsischer Gesandter |
 Alfred GeraschFranzösischer Gesandter | Französischer Gesandter |
 Margarete KupferGräfin | Gräfin |
 Julius FalkensteinFinanzminister | Finanzminister |
 Max GülstorffBürgermeister von Wien | Bürgermeister von Wien |
 Ernst Stahl-NachbaurNapoleon | Napoleon |
| SSergius SaxRussischer Diener | Russischer Diener |
 Trude BrionneNot listed | Not listed |
| FFranz NicklischNot listed | Not listed |
 Odette TalazacWoman kissed on forehead by false Tsar (uncredited) | Woman kissed on forehead by false Tsar (uncredited) |