PHOTOS: Queen Elizabeth II resplendent in pink at the Windsor Cup

The Queen arrives at the Cartier Queen's Cup Polo final

Queen knights Captain Sir Tom Moore at Windsor Castle

The Queen stuns in pink at Windsor Cup - her SIXTH engagement of week, Royal, News

Royal Family Around the World: Queen Elizabeth II and Prince Philip, Duke Of Edinburgh Carry Out Engagements In Windsor on April 20, 2016.

Queen Elizabeth II visited the Argylls' Museum at Stirling Castle

The Queen stuns in pink at Windsor Cup - her SIXTH engagement of week, Royal, News

Hrh queen elizabeth queen mother hi-res stock photography and images - Alamy

The Queen looks in high spirits as she visits Lincoln's Inn in London

256 Elizabeth Stein Stock Photos, High-Res Pictures, and Images - Getty Images

Queen elizabeth ii greets hi-res stock photography and images - Page 2 - Alamy

PHOTOS: Queen Elizabeth II visits Virginia in 1957 and 2007 – Daily Press

Guests queen elizabeth ii Black and White Stock Photos & Images - Alamy

Queen Elizabeth II: Queen shops for a new hat as she tours renovated town centre, Royal, News