It may be Princess Eugenies big day but Princess Charlotte couldnt help but steal the limelight as she waved arriving at St Georges Chapel today.
The little girl looked adorable in her wedding outfit as she headed inside to walk down the aisle.
Prince George and Princess Charlotte have been given official roles for the big day – taking up special duties as page boy and bridesmaid.
Among the other confirmed bridesmaids and page boys are Mia Tindall, daughter of former England rugby star Mike Tindall and his wife Zara, an Olympic horse rider, Louis de Givenchy, the son of a JP Morgan banking executive and Theodora Williams, daughter of pop star Robbie Williams and wife Ayda.
Two of the Queens great-grandchildren Savannah and Isla Phillips will also walk down the aisle alongside Princess Eugenies goddaughter, Maud Windsor.
Eugenie, who is ninth in line to the throne, and Jack Brooksbank are set to say their vows in the gothic surrounds of 15th century St Georges Chapel, Windsor Castle.
The Queen, the Prince of Wales, the Duke and Duchess of Cambridge and the Duke and Duchess of Sussex are all there for the grand royal celebration, joining an 850-strong congregation of celebrities, royals and VIP guests.
In a television interview ahead of the wedding, Jack paid tribute to his future wife, calling her a bright shining light.
Eugenie told Eamonn Holmes and Ruth Langsford from ITVs This Morning show that her humble and generous husband-to-be had the ability to make everyone feel so special.
Proud father the Duke of York will walk his 28-year-old daughter down the aisle.
Mother of the bride Sarah, Duchess of York – who spent years as an outcast from the royal family following her split from Andrew, will also take centre stage for the high profile royal occasion.
Her former father-in-law Philip is said to have never forgiven Fergie for the scandal she caused when she was caught in the infamous toe-sucking incident, having her feet kissed by financial adviser John Bryan in 1992.
The couples Order of Service revealed that Jack will not be wearing a ring and Eugenie will not promise to obey her husband.