Prince William and Kate Middleton's romance nearly came to grief and they almost did not marry, said a new book on the wedding anniversary of the Duke and Duchess of Cambridge.
According to the book, it was Carole Middleton who put William and Kate's relationship on track.
Prince William is the second in line to the British throne. He will become the king after his father Prince Charles.
Queen Elizabeth recently said Charles' wife Duchess Camilla will be the Queen consort when her son becomes the king.