Prince Peter Karagin, aka Peter Teranda

Nelson Eddy

Lydia Pavlovna Marakova

Ilona Massey

Nicki Popoff

Charlie Ruggles

Ivan Danchenoff

Frank Morgan

Prof. Marakov

Lionel Atwill

Gen. Karagin

C. Aubrey Smith

Masha, Lydia's Maid

Joyce Compton

Dimitri Marakov

Dalies Frantz

Lieutenant Smirnoff

Phillip Terry

Capt. Michael Sibirsky

Walter Woolf King

Ramensky

Frederick Worlock

Leo Proplinski

Abner Biberman

Capt. Sergei Pavloff

Arthur W. Cernitz

Lieutenant Nikitin

Roland Varno

Slaski, the Counterman

George Tobias

Anton

Paul Sutton

Capt. Testoff

William Costello

Capt. Testoff

Willy Castello

Prince Morodin

Paul Irving

Jeanette Sibirsky

Mildred Shay

Mrs. Danchenoff

Alma Kruger

Princess Natalya Petrovna

Zeffie Tilbury

Doorman (uncredited)

Lee Phelps

(uncredited)

Demetrius Alexis

Cafe Girl (uncredited)

Dorothy Ates

Baritone (uncredited)

Douglas Beattie

(uncredited)

John Holland

(uncredited)

John Bleifer

Soldier (uncredited)

Charles Brokaw

Crying Soldier (uncredited)

Rand Brooks

(uncredited)

Maurice Cass

Soldier (uncredited)

Feodor Chaliapin Jr.

Cafe Girl (uncredited)

Irene Coleman

(uncredited)

Alexis Davidoff

Singer (uncredited)

Dick Dennis

Singer (uncredited)

Al Ferguson

Violinist (uncredited)

Jack George

(uncredited)

Boris Glagolin

(uncredited)

John Gubbins

(uncredited)

Eddie Hart

Batoff (uncredited)

Charles Judels

(uncredited)

Ilia Khmara

(uncredited)

Harry Lamont

(uncredited)

David Laughlin

(uncredited)

Jack Luden

(uncredited)

Michael Mark

(uncredited)

Art Miles

Policeman

Paul Newlan

Sultan (uncredited)

Sigurd Nilssen

(uncredited)

Ed Payson

(uncredited)

Irra Petina

(uncredited)

Rex Post

Ivan (uncredited)

Frank Puglia

(uncredited)

Constantine Romanoff

(uncredited)

William Royle

(uncredited)

Hector V. Sarno

Soldier (uncredited)

Earl Seaman

(uncredited)

Harry Semels

(uncredited)

Marla Shelton

Lily Allison (uncredited)

Florence Shirley

(uncredited)

Robert R. Stephenson

Girl (uncredited)

Kay Sutton

(uncredited)

Dirk Thane

Wilbur Allison (uncredited)

Andrew Tombes

Corporal (uncredited)

Monte Vandergrift

(uncredited)

Ellinor Vanderveer

Danchenoff's Secretary (uncredited)

Ernö Verebes

Soldier (uncredited)

George Volk

Russian Girl (uncredited)

Marjorie Woodworth

(uncredited)

Harry Worth