Diana, Princess of Wales (1961 - 1997) and Queen Elizabeth II Watching a polo match at Guards Polo Club, Windsor, Berkshire. Princess Diana Is wearing a maternity dress and sunglasses. (Photo by Tim Graham Photo Library via Getty Images)
Diana, Princess of Wales (1961 - 1997) and Queen Elizabeth II Watching a polo match at Guards Polo Club, Windsor, Berkshire. Princess Diana Is wearing a maternity dress and sunglasses. (Photo by Tim Graham Photo Library via Getty Images)