Amma Asante directs this powerful love story, starring David Oyelowo and Rosamund Pike. From director Amma Asante (Belle), starring David Oyelowo (Selma) and Rosamund Pike (Gone Girl), comes one of the greatest love stories ever told. Set against the breath-taking backdrops of the African savannah and period London, A United Kingdom tells the story of Prince Seretse Khama of Botswana who causes an international stir when he marries a white woman from London in the late 1940s.