Lewis Stone

Rudolf Rassendyll / King Rudolf

Alice Terry

Princess Flavia

Robert Edeson

Colonel Sapt

Stuart Holmes

Grand Duke 'Black' Michael

Ramon Novarro

Rupert of Hentzau

Barbara La Marr

Antoinette de Mauban

Malcolm McGregor

Capt. Fritz von Tarlenheim

Edward Connelly

Marshal von Strakencz

Lois Lee

Countess Helga

John George

Assassin

Snitz Edwards

Josef

Fairfax Burger

Bersonin

S.E. Jennings

De Gautet

Ted Billings

Train Passenger Eating Banana (uncredited)

Eric Mayne

Rudolf's Brother Lord Burlesdon (uncredited)

Lon Poff

Archbishop (uncredited)

Frederick Vogeding

Detchard (uncredited)