Lilian Harvey as Christel Weinzinger

Willy Fritsch as Zar Alexander von Russland / Uralsky

Otto Wallburg as Bibikoff, sein Adjutant

Conrad Veidt as Fürst Metternich

Carl-Heinz Schroth as Pepi, sein Sekretär

Lil Dagover as Komtesse

Alfred Abel as König von Sachsen

Adele Sandrock as Fürstin

Paul Hörbiger as Heurigensänger

Eugen Rex as Sächsischer Gesandter

Alfred Gerasch as Französischer Gesandter

Margarete Kupfer as Gräfin

Julius Falkenstein as Finanzminister

Max Gülstorff as Bürgermeister von Wien

Ernst Stahl-Nachbaur as Napoleon

Sergius Sax as Russischer Diener

Trude Brionne as

Franz Nicklisch as

Odette Talazac as Woman kissed on forehead by false Tsar (uncredited)