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LONDON, ENGLAND - OCTOBER 12: Princess Eugenie lays a wreath during a service to commemorate the work of William Wilberforce and mark the United Kingdom's commitment to combat modern slavery at Westminster Abbey on October 12, 2016 in London, England. (Photo by Chris Radburn - WPA Pool/Getty Images)

LONDON, ENGLAND - OCTOBER 12:  Princess Eugenie lays a wreath during a service to commemorate the work of William Wilberforce and mark the United Kingdom's commitment to combat modern slavery at Westminster Abbey on October 12, 2016  in London, England. (Photo by Chris Radburn - WPA Pool/Getty Images)

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LONDON, UNITED KINGDOM - JUNE 04: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Princess Beatrice of York, Lady Louise Windsor and Princess Eugenie of York attend a service of celebration to mark the 60th anniversary of the Coronation of Queen Elizabeth II at Westminster Abbey on June 4, 2013 in London, England. The Queen's Coronation took place on June 2, 1953 after a period of mourning for her father King George VI, following her ascension to the throne on February 6, 1952. The event 60 years ago was the first time a coronation was televised for the public. (Photo by Max Mumby/Indigo/Getty Images)

LONDON, UNITED KINGDOM - JUNE 04: (EMBARGOED FOR PUBLICATION IN UK NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Princess Beatrice of York, Lady Louise Windsor and Princess Eugenie of York attend a service of celebration to mark the 60th anniversary of the Coronation of Queen Elizabeth II at Westminster Abbey on June 4, 2013 in London, England. The Queen's Coronation took place on June 2, 1953 after a period of mourning for her father King George VI, following her ascension to the throne on February 6, 1952. The event 60 years ago was the first time a coronation was televised for the public. (Photo by Max Mumby/Indigo/Getty Images)

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LONDON, UNITED KINGDOM - MAY 26: Prince Andrew, Duke of York hosts the annual Not Forgotten Association Garden Party, accompanied by Princess Beatrice and Princess Eugenie (L) at Buckingham Palace on May 26, 2016 in London, England. (Photo by John Stillwell - WPA Pool/Getty Images)

LONDON, UNITED KINGDOM - MAY 26: Prince Andrew, Duke of York hosts the annual Not Forgotten Association Garden Party, accompanied by Princess Beatrice and Princess Eugenie (L) at Buckingham Palace on May 26, 2016 in London, England. (Photo by John Stillwell - WPA Pool/Getty Images)

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Princess Beatrice of York arriving at the Victoria & Albert Museum Fashion Benefit Dinner & Alexander McQueen: Savage Beauty preview in London. (Photo by Zak Hussein/Corbis via Getty Images)

Princess Beatrice of York arriving at the Victoria & Albert Museum Fashion Benefit Dinner & Alexander McQueen: Savage Beauty preview in London. (Photo by Zak Hussein/Corbis via Getty Images)

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ASCOT, ENGLAND - JUNE 18: Princess Beatrice presents Queen Elizabeth II with the first prize for winning The Hardwick Stakes with her horse Dartmouth on day 5 of Royal Ascot at Ascot Racecourse on June 18, 2016 in Ascot, England. (Photo by Mark Cuthbert/UK Press via Getty Images)

ASCOT, ENGLAND - JUNE 18:  Princess Beatrice presents Queen Elizabeth II with the first prize for winning The Hardwick Stakes with her horse Dartmouth on day 5 of Royal Ascot at Ascot Racecourse on June 18, 2016 in Ascot, England.  (Photo by Mark Cuthbert/UK Press via Getty Images)