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Princess Eugenie of York was born on March 23, 1990.
Princess Beatrice of York.
Princess Beatrice of York is 20, and her sister, Princess Eugenie of York, is 18.
Princess Eugenie and Princess Beatrice are daughters of Prince Andrew, Duke of York.
Prince William is the son of Prince Andrews' brother, Prince Charles; so Eugenie, Beatrice and William are first cousins.