Prince William and Prince Harry bow their heads as their mother's coffin is taken out of Westminster Abbey following her funeral service in 1997. AFP
Prince Philip, Prince William, Earl Spencer, Prince Harry and Prince Charles follow the coffin of Princess Diana in September 1997. Getty Images
Princess Diana looks on as Prince William and Prince Harry hold a conversation during the VJ Day 50th anniversary celebrations In London in 1995. Getty Images
Prince Harry, Prince William and Princess Diana greeting well wishers as they attend the Christmas Day service at St Mary Magdalene Church on the Sandringham Estate in 1994. Getty Images
In this photo made available by Kensington Palace from the personal photo album of the late Diana, Princess of Wales, shows the princess and Prince Harry on holiday. AP Photo
Princess Diana, Prince William and Prince Harry visit the 'Thorpe Park' Amusement Park in 1993. Getty Images
Princess Diana watches as Prince William And Prince Harry play on a slide in the gardens of Highgrove House in 1986. The boys were wearing the uniforms of the 1st Battalion Of The Parachute Regiment, of which their Father Is The Colonel-in-chief. Getty Images
Princess Diana poses with her sons, Prince William and Prince Harry, at the piano in Kensington Palace in 1985. Getty Images
Prince Charles and Princess Diana are reunited with their sons William and Harry aboard Royal Yacht Britannia in Venice following their two week tour of Italy in 1985. Getty Images
In this photo from the personal album of the late Princess Diana, the Princess is seen holding Prince William whilst pregnant with Prince Harry. AP Photo
Prince William and Prince Harry bow their heads as their mother's coffin is taken out of Westminster Abbey following her funeral service in 1997. AFP
Prince Philip, Prince William, Earl Spencer, Prince Harry and Prince Charles follow the coffin of Princess Diana in September 1997. Getty Images
Princess Diana looks on as Prince William and Prince Harry hold a conversation during the VJ Day 50th anniversary celebrations In London in 1995. Getty Images
Prince Harry, Prince William and Princess Diana greeting well wishers as they attend the Christmas Day service at St Mary Magdalene Church on the Sandringham Estate in 1994. Getty Images
In this photo made available by Kensington Palace from the personal photo album of the late Diana, Princess of Wales, shows the princess and Prince Harry on holiday. AP Photo
Princess Diana, Prince William and Prince Harry visit the 'Thorpe Park' Amusement Park in 1993. Getty Images
Princess Diana watches as Prince William And Prince Harry play on a slide in the gardens of Highgrove House in 1986. The boys were wearing the uniforms of the 1st Battalion Of The Parachute Regiment, of which their Father Is The Colonel-in-chief. Getty Images
Princess Diana poses with her sons, Prince William and Prince Harry, at the piano in Kensington Palace in 1985. Getty Images
Prince Charles and Princess Diana are reunited with their sons William and Harry aboard Royal Yacht Britannia in Venice following their two week tour of Italy in 1985. Getty Images
In this photo from the personal album of the late Princess Diana, the Princess is seen holding Prince William whilst pregnant with Prince Harry. AP Photo
Prince William and Prince Harry bow their heads as their mother's coffin is taken out of Westminster Abbey following her funeral service in 1997. AFP