The 28-year-old stepped out on less than 24 hours before the nuptials with freshly dyed locks. She is set to wed Jack Brooksbank at St. George's Chapel, Windsor Castle on Friday, October 12.
Eugenie (the first cousin to Prince William and Prince Harry) was seen in London with a brand new auburn hair colour.
We can't help but be reminded of another auburn-haired royal bride - Eugenie's mother Sarah 'Fergie' Ferguson, The Duchess of York. Fergie wed Prince Andrew at Westminster Abbey in 1986.
Looking for more hair inspirations from your favourite a-list stars? Scroll through, The Best Celebrity Hair Transformations Of 2018.