Ramon Novarro
Role: Archduke Paul 'Gustl' Gustave
Evelyn Laye
Role: Elizabeth Katherine Anne 'Lisl' Gluck
Charles Butterworth
Role: Willy Fitch
Una Merkel
Role: Fanni Kerner
Edward Everett Horton
Role: Baron Szereny
Donald Cook
Role: Toni Berngruber
Henry Stephenson
Role: Emperor Franz Josef
Rosalind Russell
Role: Countess Zarika Rafay
Florine Baile
Role: Undetermined Role (uncredited)
Max Barwyn
Role: Max - the Waiter (uncredited)
Art Berry Sr.
Role: Undetermined Role (uncredited) (unconfirmed)
Albert Conti
Role: Mueller (uncredited)
George Davis
Role: Milkman (uncredited)
Carlos De Valdez
Role: Adjutant (uncredited)
Chico De Verdi
Role: Undetermined Role (uncredited) (unconfirmed)
Billy Dooley
Role: Coronetist (uncredited)
Elspeth Dudgeon
Role: Duchess of Reidheim (uncredited)
Kay English
Role: Undetermined Role (uncredited)
Charles Judels
Role: Riccardi (uncredited)
Edith Kingdon
Role: Dowager at Opera House (uncredited)
Michael Mark
Role: Messenger from Restaurant (uncredited)
Torben Meyer
Role: Adjutant (uncredited)
Harry 'Snub' Pollard
Role: Drummer (uncredited)
Christian Rub
Role: Café Proprietor (uncredited)
Charles Unger
Role: Undetermined Role (uncredited)
Gustav von Seyffertitz
Role: Ambassador (uncredited)