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