So, who will accompany her as she makes her way down the aisle at St George's Chapel, Windsor Castle on October 12? Here's everything you need to know.
It looks as though Princess Eugenie's father Prince Andrew will be the one to walk her down the aisle as she weds Jack Brooksbank.
Eugenie has previously spoken of their close relationship, telling Harper's Bazaar in 2016: "What can’t I live without? My family. That sounds cheesy, but I really can't.
"My father as well. He's the rock."
Eugenie's mother is Duchess of York, Sarah Ferguson, and she has one sister, Princess Beatrice.
Eugenie's older sister Princess Beatrice will be by her side as maid of honour.
Princess Charlotte will be a flower girl alongside Peter and Autumn Phillips' daughters, Savannah aged seven and Isla aged six.
Robbie Williams and Ayda Field's daughter, six-year-old Theodora Williams has also been given the role of flower girl alongside four-year-old Mia Tindall (daughter of Mike and Zara Tindall) and Princess Eugenie's goddaughter Maud Windsor.
Five-year-old Maud (daughter of Lord Frederick Windsor and Sophie Winkleman) is the cousin of Prince George, Princess Charlotte and Prince Louis and is in the same class as George at school.
Prince George will be a page boy with six-year-old Louis de Givenchy
Louis is the son of J.P. Morgan executive Olivier de Givenchy.
Princess Eugenie's fiancé, Jack Brooksbank has chosen his brother Thomas to be best man.
Special attendants are 14-year-old Lady Louise Mountbatten-Windsor, and 10-year-old Viscount Severn.
As previously mentioned, Andrew is likely to play a traditional role in Eugenie's wedding and walk her down the aisle.
The father of the bride also usually gives a speech at the wedding reception.
He and Eugenie's mother Sarah, Duchess of York, are also thought to be working together to help arrange the reception at Windsor Castle.
"The plan is for a marquee to be set up in the grounds and dancing late into the night.
"Eugenie and Jack are planning the whole thing but Sarah and Andrew are very involved."
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