WINDSOR, ENGLAND - MAY 15: Queen Elizabeth II attends the Royal Windsor Horse show in the private grounds of Windsor Castle on May 15, 2015 in Windsor, England. (Photo by Mark Cuthbert/UK Press via Getty Images)
WINDSOR, ENGLAND - MAY 15: Queen Elizabeth II attends the Royal Windsor Horse show in the private grounds of Windsor Castle on May 15, 2015 in Windsor, England. (Photo by Mark Cuthbert/UK Press via Getty Images)