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

Reinhold Schünzel