The Lady from Longacre (1921)

To escape a loathsome marriage to the king of a neighboring principality, Princess Isabel flees her kingdom for England, where she is rescued by Lord Anthony Conway. His friends are distressed by his gay escapades, and they rebel when he encourages them to entertain the princess, assuming her to be an actress whom she strongly resembles. Returning to her country with the Englishman, she realizes that she must marry the neighboring king to save her country, in spite of her love for Lord Anthony; but she finds that the king has been seduced by the charms of actress, Molly Moncke, whom he marries, leaving the princess happy with Anthony.