But how is Princess Eugenie related to Prince Harry, exactly? The best way to figure out the who’s who of royal family members is to look to their matriarch, Queen Elizabeth. Eugenie is the her granddaughter; Eugenie's father is Prince Andrew. Harry is the son of Prince Charles, Andrew’s brother and the Queen’s oldest son.
While this may sound confusing, but it's not. The two royals are first cousins! Phew.