In memory of Diana, Princess of Wales, who was killed in an automobile accident in Paris, France on August 31, 1997. [Getty Images]

LONDON - SEPTEMBER 1997: Prince William, Prince of Wales, with his sons Princes William and Harry looking at floral tributes left at Kensington Palace following the death of Diana, Princess of Wales in September, 1997. (Photo by Anwar Hussein/WireImage) — see more

LONDON - SEPTEMBER 1997: Prince William, Prince of Wales, with his sons Princes William and Harry looking at floral tributes left at Kensington Palace following the death of Diana, Princess of Wales in September, 1997. (Photo by Anwar Hussein/WireImage)

WireImage Anwar Hussein