One of the most important pre-wedding rules for future brides is to steer clear of any beauty treatments in the lead-up to the big day. While it may seem counter-intuitive - a facial might cause a breakout while a haircut could go horribly awry.
The 28-year-old stepped out on less than 24 hours before the nuptials with freshly dyed reddish brown locks. She is set to wed Jack Brooksbank at St. George's Chapel, Windsor Castle on Friday, October 12.
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.
Find out more about Princess Eugenie's nuptials by following our royal wedding coverage, here.