Ramon Novarro as Prince Karl Heinrich

Norma Shearer as Kathi

Jean Hersholt as Dr. Jüttner

Gustav von Seyffertitz as King Karl VII

Philippe De Lacy as Heir Apparent

Edgar Norton as Lutz

Bobbie Mack as Kellermann

Edward Connelly as Court Marshal

Otis Harlan as Old Ruder

John S. Peters as Student

George K. Arthur as Drunk Student (uncredited)

Lionel Belmore as Stout Student (uncredited)

Robert Brower as Minister to the King (uncredited)

Edythe Chapman as Young Karl's Nanny (uncredited)