Here's what someone who used to work for the royal family said about the king's relationship with his heir, Prince William. Following Prince Harry‘s reunion with King Charles during the Sussexes’ trip to the U.K., there have been a barrage of reports that the monarch and his oldest son, Prince William, are feuding. Grant Harrold was King Charles’ butler for seven years. He looked after Prince William, Catherine, and Prince Harry as well when they stayed at Highgrove House. Prince William was always very good at supporting his father, so they’ve got a wonderful relationship.