Prisoner of Zenda, The - 1937

This is a classic swash-buckler of impersonation. Rudolph Rassendyll, King Rudolf V's identical lookalike cousin, is asked to risk his life and impersonate the King because of a feared assassination attempt, but when the real King is kidnapped, Rassendyll finds that he must continue the impersonation. This 1937 movie is a dramatic adventure.