LONDON, UNITED KINGDOM - JUNE 10: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Princess Eugenie attends a national service of thanksgiving to mark Queen Elizabeth II's 90th birthday at St Paul's Cathedral on June 10, 2016 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
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LONDON, UNITED KINGDOM - JUNE 10: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Princess Eugenie attends a national service of thanksgiving to mark Queen Elizabeth II's 90th birthday at St Paul's Cathedral on June 10, 2016 in London, England. (Photo by Max Mumby/Indigo/Getty Images)
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Getty Images Entertainment Max Mumby/Indigo

LONDON, ENGLAND - JUNE 10: Princess Eugenie attends a lunch after the National Service of Thanksgiving as part of the 90th birthday celebrations for The Queen at The Guildhall on June 10, 2016 in London, England. (Photo by Arthur Edwards - WPA Pool/Getty Images)
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