"Young Austrian Archduke Paul "Gustl" Gustave is in an arranged engagement but his uncle, the emperor, decides to let Gustl carry on a fling with ballet dancer Lisl Gluck."
Ramon Novarro
as Archduke Paul 'Gustl' Gustave
Evelyn Laye
as Elizabeth Katherine Anne 'Lisl' Gluck
Charles Butterworth
as Willy Fitch
Una Merkel
as Fanni Kerner
Edward Everett Horton
as Baron Szereny
Donald Cook
as Toni Berngruber
Henry Stephenson
as Emperor Franz Josef
Rosalind Russell
as Countess Zarika Rafay
Herman Bing
as Nepomuk
Florine Baile
as Undetermined Role (uncredited)
Max Barwyn
as Max - the Waiter (uncredited)
Art Berry Sr.
as Undetermined Role (uncredited) (unconfirmed)
Albert Conti
as Mueller (uncredited)
George Davis
as Milkman (uncredited)
Carlos De Valdez
as Adjutant (uncredited)
Chico De Verdi
Billy Dooley
as Coronetist (uncredited)
Elspeth Dudgeon
as Duchess of Reidheim (uncredited)
Kay English
Charles Judels
as Riccardi (uncredited)
Edith Kingdon
as Dowager at Opera House (uncredited)
Michael Mark
as Messenger from Restaurant (uncredited)
Torben Meyer
Harry 'Snub' Pollard
as Drummer (uncredited)
Christian Rub
as Café Proprietor (uncredited)
Charles Unger
Gustav von Seyffertitz
as Ambassador (uncredited)
Franz Schulz
Screenplay
Vicki Baum
Story
Edgar Allan Woolf
Dudley Murphy
Director
Conrad A. Nervig
Editor
Douglas Shearer
Sound Recordist
Cedric Gibbons
Art Direction
Harry Rapf
Producer
James Wong Howe
Director of Photography
Dolly Tree
Wardrobe Master
Fredric Hope
Edwin B. Willis
Oscar Hammerstein II
Musical
R. H. Bassett
Orchestrator
Charles Maxwell
Henry Grace
Set Decoration
Sigmund Romberg
Music
Oscar Radin
Paul Marquardt
Leonid Raab
Herbert Stothart
Conductor
Wayne Allen
Jack Virgil
Chester Hale
Choreographer