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

Florine Baile

Undetermined Role (uncredited)

Max Barwyn

Max - the Waiter (uncredited)

Art Berry Sr.

Undetermined Role (uncredited) (unconfirmed)

Albert Conti

Mueller (uncredited)

George Davis

Milkman (uncredited)

Carlos De Valdez

Adjutant (uncredited)

Chico De Verdi

Undetermined Role (uncredited) (unconfirmed)

Billy Dooley

Coronetist (uncredited)

Elspeth Dudgeon

Duchess of Reidheim (uncredited)

Kay English

Undetermined Role (uncredited)

Charles Judels

Riccardi (uncredited)

Edith Kingdon

Dowager at Opera House (uncredited)

Michael Mark

Messenger from Restaurant (uncredited)

Torben Meyer

Adjutant (uncredited)

Harry 'Snub' Pollard

Drummer (uncredited)

Christian Rub

Café Proprietor (uncredited)

Charles Unger

Undetermined Role (uncredited)

Gustav von Seyffertitz

Ambassador (uncredited)