Ramon Novarro

Archduke Paul 'Gustl' Gustave

Evelyn Laye

Elizabeth Katherine Anne 'Lisl' Gluck

Charles Butterworth

Willy Fitch

Una Merkel

Fanni Kerner

Edward Everett Horton

Baron Szereny

Donald Cook

Toni Berngruber

Henry Stephenson

Emperor Franz Josef

Rosalind Russell

Countess Zarika Rafay

Herman Bing

Nepomuk

Max Barwyn

Max - the Waiter (uncredited)

Albert Conti

Mueller (uncredited)

George Davis

Milkman (uncredited)

Billy Dooley

Coronetist (uncredited)

Elspeth Dudgeon

Duchess of Reidheim (uncredited)

Kay English

Undetermined Role (uncredited)

Charles Judels

Riccardi (uncredited)

Michael Mark

Messenger from Restaurant (uncredited)

Torben Meyer

Adjutant (uncredited)

Harry 'Snub' Pollard

Drummer (uncredited)

Christian Rub

Café Proprietor (uncredited)

Gustav von Seyffertitz

Ambassador (uncredited)