Prince Harry revealed a quirky household habit he shares with his father, King Charles, and brother, Prince William, which leaves his wife Meghan Markle baffled. In the 2018 BBC documentary Prince, Son and Heir: Charles at 70, celebrating Prince Charles' 70th birthday, Harry, along with his brother William, shared some intimate details about their lives. Among these was Harry's admission that he still refers to the late Princess Diana as 'Mummy' and his request for his father to walk Meghan down the aisle at their wedding.