- James K. Hackett
- Rudolf Rassendyll / King Rudolf of Ruritania
- Beatrice Beckley
- Princess Flavia
- David Torrence
- Michael, Duke of Strelsau
- Frazer Coulter
- Colonel Sapt
- William R. Randall
- Fritz von Tarlenheim
- Walter Hale
- Rupert of Hentzau
- Frank Shannon
- Detchard
- Minna Gale
- Antoinette de Mauban
- Charles Green
- Johann - Servant to the King
- Tom Callahan
- Josef - Servant to the King
- Sidney Barrington
- Marshal Strakencz
- Walter Claton
- Chancellor
- Henry Hebert
- 1st Minister
- Wilmer Damo
- 2nd Minister
- George Neville
- Lorenz Teppich
- William H. Cone
- Franz Teppich
- Anders Randolf
- One of Black Michael's Conspirators
- Frank Stone
- One of Black Michael's Conspirators
- Harry Hammill
- One of Michael's Conspirators
- Frank Young
- Lord Topham
- John E. Trevor
- Cardinal
- Irving Williams
- French Butler
