George Arliss
— Voltaire
Margaret Lindsay
— Nanette Calas
Doris Kenyon
— Mme. Pompadour
Alan Mowbray
— Count de Sarnac
Reginald Owen
— King Louis XV
Theodore Newton
— François
Gordon Westcott
— The Captain
Murray Kinnell
— Emile, Voltaire's Servant
Doris Lloyd
— Mme. Clarion, Actress
David Torrence
— Dr. Tronchin
John George
— Protester in Montage