WINDSOR, ENGLAND - APRIL 21: Queen Elizabeth II on a walkabout to celebrate the Queen's 90th Birthday on April 21, 2016 in Windsor, England. (Photo by Mark Cuthbert/UK Press via Getty Images)
WINDSOR, ENGLAND - APRIL 21: Queen Elizabeth II on a walkabout to celebrate the Queen's 90th Birthday on April 21, 2016 in Windsor, England. (Photo by Mark Cuthbert/UK Press via Getty Images)