WINDSOR, UNITED KINGDOM - APRIL 16: (L-R) Princess Eugenie, Princess Beatrice, Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, James Viscount Severn, Lady Louise Windsor, Sophie, Countess of Wessex and Prince Edward, Earl of Wessex attend the Easter Day service at St George's Chapel on April 16, 2017 in Windsor, England. (Photo by Peter Nicholls/WPA Pool/Getty Images)

WINDSOR, UNITED KINGDOM - APRIL 16:  (L-R) Princess Eugenie, Princess Beatrice, Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge, James Viscount Severn, Lady Louise Windsor, Sophie, Countess of Wessex and Prince Edward, Earl of Wessex attend the Easter Day service at St George's Chapel on April 16, 2017 in Windsor, England. (Photo by Peter Nicholls/WPA Pool/Getty Images)

Britain's Sophie, Countess of Wessex, (R) and James, Viscount Severn (L) arrive to attend the Easter Sunday service at St George's Chapel, Windsor Castle, west of London on April 16, 2017. / AFP PHOTO / POOL / Jonathan Brady (Photo credit should read JONATHAN BRADY/AFP/Getty Images)

Britain's Sophie, Countess of Wessex, (R) and James, Viscount Severn (L) arrive to attend the Easter Sunday service at St George's Chapel, Windsor Castle, west of London on April 16, 2017. / AFP PHOTO / POOL / Jonathan Brady        (Photo credit should read JONATHAN BRADY/AFP/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: Lady Louise Windsor attends 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: Lady Louise Windsor attends 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, UNITED KINGDOM - APRIL 16: Princess Anne, Princess Royal and husband Timothy Laurence leave the Easter Day service at St George's Chapel on April 16, 2017 in Windsor, England. (Photo by Peter Nicholls/WPA Pool/Getty Images)

WINDSOR, UNITED KINGDOM - APRIL 16:  Princess Anne, Princess Royal and husband Timothy Laurence leave the Easter Day service at St George's Chapel on April 16, 2017 in Windsor, England. (Photo by Peter Nicholls/WPA Pool/Getty Images)