WINDSOR, UNITED KINGDOM - APRIL 16: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Peter Phillips, Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Autumn Phillips, Princess Eugenie and Princess Beatrice attend the traditional Easter Sunday church service at St George's Chapel, Windsor Castle on April 16, 2017 in Windsor, England. (Photo by Max Mumby/Indigo/Getty Images)

WINDSOR, UNITED KINGDOM - APRIL 16: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Peter Phillips, Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Autumn Phillips, Princess Eugenie and Princess Beatrice attend the traditional Easter Sunday church service at St George's Chapel, Windsor Castle on April 16, 2017 in Windsor, England. (Photo by Max Mumby/Indigo/Getty Images)

WINDSOR, ENGLAND - APRIL 16: Sophie, Countess of Wessex and Lady Louise Windsor attend the Easter Day service at St George's Chapel on April 16, 2017 in Windsor, England. (Photo by Mark Cuthbert/UK Press via Getty Images)

WINDSOR, ENGLAND - APRIL 16: Sophie, Countess of Wessex and Lady Louise Windsor attend the Easter Day service at St George's Chapel on April 16, 2017 in Windsor, England. (Photo by Mark Cuthbert/UK Press via Getty Images)

WINDSOR, ENGLAND - APRIL 16: Catherine, Duchess of Cambridge as she attends Easter Day Service at St George's Chapel on April 16, 2017 in Windsor, England. (Photo by Samir Hussein/Samir Hussein/WireImage)

WINDSOR, ENGLAND - APRIL 16:  Catherine, Duchess of Cambridge as she attends Easter Day Service at St George's Chapel on April 16, 2017 in Windsor, England.  (Photo by Samir Hussein/Samir Hussein/WireImage)

WINDSOR, ENGLAND - APRIL 16: Princess Beatrice of York (R) and Princess Eugenie of York attend Easter Day Service at St George's Chapel on April 16, 2017 in Windsor, England. (Photo by Samir Hussein/Samir Hussein/WireImage)

WINDSOR, ENGLAND - APRIL 16:  Princess Beatrice of York (R) and Princess Eugenie of York attend Easter Day Service at St George's Chapel on April 16, 2017 in Windsor, England.  (Photo by Samir Hussein/Samir Hussein/WireImage)

WINDSOR, UNITED KINGDOM - APRIL 16: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Princess Anne, The Princess Royal attends the traditional Easter Sunday church service at St George's Chapel, Windsor Castle on April 16, 2017 in Windsor, England. (Photo by Max Mumby/Indigo/Getty Images)

WINDSOR, UNITED KINGDOM - APRIL 16: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Princess Anne, The Princess Royal attends the traditional Easter Sunday church service at St George's Chapel, Windsor Castle on April 16, 2017 in Windsor, England. (Photo by Max Mumby/Indigo/Getty Images)