They will then take an open-top carriage ride through Windsor, although it will be shorter than the one Harry and Meghan took in May when thousands thronged the streets and hundreds of millions worldwide watched on television.
Prince George and Princess Charlotte will also play a starring role among the young helpers, along with Zara and Mike Tindall's spirited four-year-old Mia and Peter and Autumn Phillips' daughters Savannah and Isla.
Because the wedding takes place on a weekday, and they are "minor" royals, it is unlikely to attract the 13 million United Kingdom audience of her cousin's wedding.
The Queen is hosting an afternoon reception in St George's Hall, within the castle, followed by an all-nighter at the Royal Lodge in Windsor Great Park.
Pentagon grounds F-35 fighter jets in wake of crash Dan Sullivan, R-Alaska, raised questions on the troubles still facing the F-35 program and its readiness rate of about 65 percent. In May, Israeli officials confirmed that the country's F-35 "Adir" had conducted two airstrikes somewhere in the Middle East.
It also could just be a color that Princess Eugenie likes, as she's worn various versions of red over the years.
Another 1,200 members of the public selected by ballot will listen to a live broadcast in the castle grounds, and thousands are expected to watch from outside. "I was here for Harry and Meghan's wedding, I wouldn't miss it, I love the atmosphere".
Mr Brooksbank has asked his brother, Thomas Brooksbank, to be his best man, while Eugenie's older sister Princess Beatrice will be her maid of honour.
Before this major (and honestly unexpected) switch, Princess Eugenie had been wearing her hair in a brunette shade with warm highlights as of late, one that was strikingly similar to Kate Middleton's hair color.
Prince George and Princess Charlotte will be among the pageboys and bridesmaids, alongside X Factor judge Robbie Williams's daughter Theodora.
The whole wedding will be shown on a This Morning special.