Eugenie, 28, has sported a similar hair shade in the past but has recently been rocking dark brown locks with a reddish tinge.
The new colour is very similar to her mum Sarah Ferguson's hair, which leaves us wondering whether Eugenie has been inspired by Fergie's wedding day look for her own nuptials?
Princess Eugenie will marry Jack Brooksbank at St. George's Chapel, Windsor Castle on Friday October 12.
Royal family members attending include Queen Elizabeth, Kate Middleton, Prince William, Prince Harry and Meghan Markle amongst others.
Channel 7 will be airing Eugenie's wedding live on October 12, as the only Australian broadcaster with cameras in the Chapel! More info here.