The First Gentleman (1948)
The First Gentleman is a 1948 British historical drama film directed by Alberto Cavalcanti and starring Jean-Pierre Aumont, Joan Hopkins and Cecil Parker. It portrays the relationships and marriage of George, Prince Regent and his tense dealings with other members of his family such as Princess Charlotte and the Duke of York. It was also released as Affairs of a Rogue.The film is based on a play, "The First Gentleman" by Norman Ginsbury, which was staged in London in 1945, starring Robert Morley as the Prince Regent and Wendy Hiller as Princess Charlotte.
More at Wikipedia.