Buckingham Palace said Wednesday that Eugenie has asked elder sister Princess Beatrice to be her maid of honour.
Joining the Bridesmaids will also be Princess Eugenie's goddaughter Maud Windsor, 5, who is the granddaughter of Prince and Princess Michael of Kent. That is, unless you're Princess Eugenie.
Prince George, five, will be joined by fellow page boy Louis de Givenchy - the six-year-old son of JP Morgan banking executive Olivier de Givenchy and his wife Zoe.
The children of the Early and Countess of Wessex, 14-year-old Lady Louise Mountbatten-Windsor, and 10-year-old Viscount Severn, will take on the role of special attendants.More news: European Leaders Demand Investigation Of Slain Bulgarian Journalist
Who is in Eugenie and Jack's bridal party?.
Camilla Parker-Bowles will apparently not attend this week's Royal Wedding.
Mr Brooksbank is a former manager of Mayfair club Mahiki and the couple met while skiing. Although Camilla is not Eugenie's blood-related aunt, she's definitely a close member of the family, but has chosen not to attend Eugenie's wedding at Windsor Castle.
A palace spokesperson said: "The attendees will view the arrival of the congregation and Members of the Royal Family, listen to a live broadcast of the Marriage Service and watch as the Bride and Groom depart St George's Chapel at the end of the ceremony".
Like Meghan and Harry, the newlyweds will then undertake a short carriage procession through part of Windsor High Street.