Queen Elizabeth II, wearing a yellow hat with white trim designed by Marie O'Regan for Ian Thomas, during an official visit to Washington, DC, USA, 15 May 1991. (Photo by Tim Graham Photo Library via Getty Images)
Queen Elizabeth II, wearing a yellow hat with white trim designed by Marie O'Regan for Ian Thomas, during an official visit to Washington, DC, USA, 15 May 1991. (Photo by Tim Graham Photo Library via Getty Images)