Order Of The Garter Service [Getty Images]

WINDSOR, UNITED KINGDOM - JUNE 13: Prince Charles, Prince of Wales (R) and Prince William, Duke of Cambridge are driven past crowds as they arrive for the Order of The Garter Service at Windsor Castle on June 13, 2016 in Windsor, England. The annual service is held in St George's Chapel at Windsor Castle. (Photo by Matt Dunham/WPA Pool/Getty Images)

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