The Prince and the Pauper (1990)

Long ago in a land with an ailing king, there was a pair of boys who looked exactly alike, a pauper called Mickey and the other, the Crown Prince. Mickey dreamed of plenty and an easy life as Royalty and the Prince dreamed of the freedom as a subject. Happenstance throws them together and their mutual resemblence inspires the pair to switch identities to see how the other lives. To their surprise, Mickey learns of the duties and responsibilties of royalty while the Prince learns to his horror that the Royal Captain of the Guard has taken advantage of the existing power vacuum to inflict brutal tyranny on the subjects. Now the Prince must react to this evil, unaware that the Captain knows about the identity swap and is using it to his own advantage while dominating Mickey who play the Heir to the Throne.