EXCLUSIVE: No one was more surprised than Kate Middleton when Prince William gave her Princess Diana's oval sapphire engagement ring. Why? Because it was his brother, Prince Harry, who received it after his beloved mother died.

Following their mother's tragic death in 1997, Prince Charles took Harry and William to visit Kensington Palace, Diana's home, where they selected mementos from their mummy's possessions. Prince Harry chose the ring and Prince William chose Diana's 18K yellow gold Cartier Tank Francaise watch that she used to teach him the time.