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

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)

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)

Al Ferguson

Singer (uncredited)

Jack George

Violinist (uncredited)

Eddie Hart

(uncredited)

John Holland

(uncredited)

Charles Judels

Batoff (uncredited)

Harry Lamont

(uncredited)

Jack Luden

(uncredited)

Michael Mark

(uncredited)

Art Miles

(uncredited)

Paul Newlan

Policeman

Lee Phelps

Doorman (uncredited)

Frank Puglia

Ivan (uncredited)

Constantine Romanoff

(uncredited)

William Royle

(uncredited)

Hector V. Sarno

(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)

Marjorie Woodworth

Russian Girl (uncredited)

Harry Worth

(uncredited)