Since her marriage to Norton Knatchbull, 3rd Earl Mountbatten of Burma, second cousin of Charles, Prince of Wales, Lady Mountbatten has been in close contact with the Royal Family. She frequently attends the Royal Windsor Horse Show as a guest of the Royal Family. She was particularly close to the late Duke of Edinburgh since the 1990s when he taught her how to carriage drive. She was one of only 30 mourners at his funeral on 17 April 2021 at St George's Chapel, Windsor Castle.