The Swan (movie, 1956)

Princess Beatrice's days of enjoying the regal life are numbered unless her only daughter, Princess Alexandra, makes a good impression on a distant cousin when he pays a surprise visit to their palace. Prince Albert has searched all over Europe for a bride and he's bored by the whole courtship routine. He is more interested in the estate's dairy than Alexandra's rose garden. And then he starts playing football with the tutor and Alexandra's brothers. Invite the tutor to the ball that night and watch how gracefully Alexandra dances with him.