A prince is about to be crowned king, but his popular half-brother, drugs and kidnapps him to stop him becoming king. Howver a visiting English gentleman looks identical to the prince and so is talked into pretening to be him and get crowned in his place till the real prince can be rescued. This is one of several versions of the story and one of the best with a strong cast.
4/5 
Madeleine Carroll
C Aubrey Smith
Raymond Massey
Mary Astor
David Niven
Douglas Fairbanks Jr 