Britain's Camilla, Duchess of Cornwall (L) and Britain's Princess Alexandra (R) hold on to their hats as they make their way towards guests during a garden party in honour of the centenary of the Women's Institute at Buckingham Palace in London on June 2, 2015.  AFP PHOTO / POOL / JOHN STILLWELL (Photo by JOHN STILLWELL / POOL / AFP) (Photo by JOHN STILLWELL/POOL/AFP via Getty Images)