Prince William had an incredibly close bond with his mother, Princess Diana, right up until her death in 1997. Now, it's been claimed William made a very special promise to his mother one year before her death.
Paul Burrell, Diana's former butler, says that the Princess was unhappy about losing one of her titles following her separation from Prince Charles, the Mirror reports.
After the couple divorced, Diana would no longer be known as her Royal Highness. But, despite the Queen being 'fine' with Diana keeping the HRH status, Prince Charles insisted it be stripped.
That would mean Princess Diana would have to curtsy to her sons, William and Harry.
William was just 14 at the time of his parents' divorce and promised his mother to restore her title.
'Don't worry Mummy, I will give it back to you one day when I am king,' Paul Burrell recalls William as saying.
Since Diana's death, Burrell has been distanced from the royal family. He claims he has not spoken to William or Harry since their mother's passing.
Burrell frequently releases intimate details about what he claims went on 'behind palace walls.'