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- Britain's Queen Elizabeth II smiles and waves to members of the public as she leaves after attending the Easter Mattins Service at St. George's Chapel, Windsor Castle on April 21, 2019. - Britain's Queen Elizabeth II celebrates her birthday on Sunday, marking 93 years in the public glare. (Photo by KIRSTY WIGGLESWORTH / POOL / AFP) (Photo credit should read KIRSTY WIGGLESWORTH/AFP/Getty Images)
- WINDSOR, ENGLAND - APRIL 21: (L-R) Catherine, Duchess of Cambridge chats with Zara Tindall as they arrive for the Easter Sunday service at St George's Chapel on April 21, 2019 in Windsor, England. (Photo by Kirsty Wigglesworth - WPA Pool/Getty Images)
- WINDSOR, ENGLAND - APRIL 21: Catherine, Duchess of Cambridge ,Prince William, Duke of Cambridge Mike Tindall and Zara Tindall attend Easter Sunday service at St George's Chapel on April 21, 2019 in Windsor, England. (Photo by Samir Hussein/Samir Hussein/WireImage)
- Britain's Catherine, Duchess of Cambridge (L) smiles at Zara Tindall as they arrrive for the Easter Mattins Service at St. George's Chapel, Windsor Castle on April 21, 2019. - Britain's Queen Elizabeth II celebrates her birthday on Sunday, marking 93 years in the public glare. (Photo by Eamonn M. MCCORMACK / POOL / AFP) (Photo credit should read EAMONN M. MCCORMACK/AFP/Getty Images)
- WINDSOR, ENGLAND - APRIL 21: Anne, Princess Royal and Vice Admiral Sir Timothy Laurence attend Easter Sunday service at St George's Chapel on April 21, 2019 in Windsor, England. (Photo by Ian Vogler - WPA Pool/Getty Images)
- WINDSOR, ENGLAND - APRIL 21: Prince Harry, Duke of Sussex attends Easter Sunday service at St George's Chapel on April 21, 2019 in Windsor, England. (Photo by Ian Vogler - WPA Pool/Getty Images)
- WINDSOR, ENGLAND - APRIL 21: Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend Easter Sunday service at St George's Chapel on April 21, 2019 in Windsor, England. (Photo by Ian Vogler - WPA Pool/Getty Images)
- WINDSOR, ENGLAND - APRIL 21: Queen Elizabeth II attends Easter Sunday service at St George's Chapel on April 21, 2019 in Windsor, England. (Photo by Ian Vogler - WPA Pool/Getty Images)
- WINDSOR, ENGLAND - APRIL 21: Prince William, Duke of Cambridge and v attend Easter Sunday service at St George's Chapel on April 21, 2019 in Windsor, England. (Photo by Ian Vogler - WPA Pool/Getty Images)
- WINDSOR, ENGLAND - APRIL 21: Autumn Phillips and Peter Phillips attend Easter Sunday service at St George's Chapel on April 21, 2019 in Windsor, England. (Photo by Ian Vogler - WPA Pool/Getty Images)
- WINDSOR, ENGLAND - APRIL 21:(L-R) Mike Tindall, Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge greet Queen Elizabeth II as she arrives for the Easter Sunday service at St George's Chapel on April 21, 2019 in Windsor, England. (Photo by Kirsty Wigglesworth - WPA Pool/Getty Images)
- WINDSOR, ENGLAND - APRIL 21: (L-R) Prince Harry, Duke of Sussex, Zara Tindall, Mike Tindall, Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge greet Queen Elizabeth II as she arrives for the Easter Sunday service at St George's Chapel on April 21, 2019 in Windsor, England. (Photo by Eamonn M. McCormack/Getty Images)
- WINDSOR, ENGLAND - APRIL 21: Prince Harry, Duke of Sussex, Autumn Phillips and Peter Phillips attend Easter Sunday service at St George's Chapel on April 21, 2019 in Windsor, England. (Photo by Samir Hussein/Samir Hussein/WireImage)
- WINDSOR, ENGLAND - APRIL 21: Catherine, Duchess of Cambridge attensd Easter Sunday service at St George's Chapel on April 21, 2019 in Windsor, England. (Photo by Samir Hussein/Samir Hussein/WireImage)
- WINDSOR, ENGLAND - APRIL 21: (L-R) Anne, Princess Royal, Prince Harry, Duke of Sussex, Vice Admiral Sir Timothy Laurence, Autumn Phillips and Peter Phillips attend the Easter Sunday service at St George's Chapel on April 21, 2019 in Windsor, England. (Photo by Eamonn M. McCormack/Getty Images)