Nelson Eddy
Prince Peter Karagin, aka Peter Teranda
Ilona Massey
Lydia Marakova
Charles Ruggles
Nicki Popoff
Frank Morgan
Ivan Danchenoff
Lionel Atwill
Professor Marakov
C. Aubrey Smith
General Karagin
Joyce Compton
Masha
Dalies Frantz
Dimitri Marakov
Phillip Terry
Lieutenant Smirnoff
Walter Woolf King
Michael Sibirsky
Frederick Worlock
Ramensky
Abner Biberman
Leo Proplinski
Arthur W. Cernitz
Sergei Pavloff
Roland Varno
Lieutenant Nikitin
George Tobias
Slaski
Paul Sutton
Anton
Willy Castello
Capt. Testoff
Paul Irving
Prince Morodin
Mildred Shay
Jeanette Sibirsky
Alma Kruger
Mrs. Danchenoff
Zeffie Tilbury
Natalya Petrovna
Demetrius Alexis
(uncredited)
Dorothy Ates
Cafe Girl (uncredited)
Douglas Beattie
Baritone (uncredited)
John Bleifer
(uncredited)
Charles Brokaw
Soldier (uncredited)
Rand Brooks
Crying Soldier (uncredited)
Maurice Cass
(uncredited)
Feodor Chaliapin Jr.
Soldier (uncredited)
Irene Coleman
Cafe Girl (uncredited)
Alexis Davidoff
(uncredited)
Dick Dennis
Singer (uncredited)
Al Ferguson
Singer (uncredited)
Jack George
Violinist (uncredited)
Boris Glagolin
(uncredited)
John Gubbins
(uncredited)
Eddie Hart
(uncredited)
John Holland
(uncredited)
Charles Judels
Batoff (uncredited)
Ilia Khmara
(uncredited)
Harry Lamont
(uncredited)
David Laughlin
(uncredited)
Jack Luden
(uncredited)
Michael Mark
(uncredited)
Art Miles
(uncredited)
Paul Newlan
Policeman
Sigurd Nilssen
Sultan (uncredited)
Ed Payson
(uncredited)
Irra Petina
(uncredited)
Lee Phelps
Doorman (uncredited)
Rex Post
(uncredited)
Frank Puglia
Ivan (uncredited)
Constantine Romanoff
(uncredited)
William Royle
(uncredited)
Hector V. Sarno
(uncredited)
Earl Seaman
Soldier (uncredited)
Harry Semels
(uncredited)
Marla Shelton
(uncredited)
Florence Shirley
Lily Allison (uncredited)
Robert R. Stephenson
(uncredited)
Kay Sutton
Girl (uncredited)
Dirk Thane
(uncredited)
Andrew Tombes
Wilbur Allison (uncredited)
Monte Vandergrift
Corporal (uncredited)
Ellinor Vanderveer
(uncredited)
Ernö Verebes
Danchenoff's Secretary (uncredited)
George Volk
Soldier (uncredited)
Marjorie Woodworth
Russian Girl (uncredited)
Harry Worth
(uncredited)
Reinhold Schünzel
Director
Adrian
Costume Design
Herbert Stothart
Original Music Composer
Karl Freund
Director of Photography
Joseph Ruttenberg
Director of Photography
George Boemler
Editor
Cedric Gibbons
Art Direction
Lawrence Weingarten
Producer
Edwin B. Willis
Set Decoration
Eric Maschwitz
Theatre Play
Leon Gordon
Screenplay
Charles Bennett
Screenplay
Jacques Deval
Screenplay