LONDON, ENGLAND - MAY 16: Prince Philip, Duke of Edinburgh (L) and Queen Elizabeth II (R) arrive to greet guests at a garden party at Buckingham Palace on May 16, 2017 in London, England. (Photo by Jack Taylor - WPA Pool /Getty Images)
LONDON, ENGLAND - MAY 16: Prince Philip, Duke of Edinburgh (L) and Queen Elizabeth II (R) arrive to greet guests at a garden party at Buckingham Palace on May 16, 2017 in London, England. (Photo by Jack Taylor - WPA Pool /Getty Images)