The Duchess of Cambridge will probably choose something understated, partly to ensure she doesn't detract from the bride and partly to ensure she's able to keep Prince George and Princess Charlotte in check (rumoured to be page boy and flower girl).
As well as Charlotte, three, the other bridesmaids will be Peter and Autumn Phillips's daughters, Savannah, seven, ...
She has also asked Robbie and Ayda Williams' daughter Theodora, six, to be a bridesmaid.
They are protective over their young children, and choose not to show their children's faces when they post on social media.
More than 800 guests will gather in the 15th-century Gothic chapel, five months after the Duke and Duchess of Sussex staged their star-studded nuptials in the same venue.
The Walking Dead Season 9 Premiere Ratings Lowest Since 2010
AMC doesn't release numbers for the streaming service, though, so we don't know for sure how many people watched it there. The Hollywood Reporter reports that the premiere achieved a 2.5 rating among adults ranging from 18-49.
Ten-year-old Viscount Severn and Lady Louise Mountbatten-Windsor, 14, will also be part of the wedding as special attendants.
After years of keeping her distance, Sarah "Fergie" Ferguson will once again be reunited with the royal family of her ex-husband Prince Andrew as they all gather for her their daughter Eugenie's wedding.
Eugenie, ninth-in-line to the throne, works in the art world while her fiance, a former manager of popular London nightclub Mahiki, works in the drinks and hospitality industry. Do you plan on watching the wedding?
Mr Brooksbank is a former manager of Mayfair club Mahiki and the couple met while skiing.
The Buckingham Palace announcement comes two days before the couple's Windsor wedding.
Her cousin Prince Harry and wife Meghan had their glittering wedding in May at the same location.
There are rumours George Clooney and his wife Amal will be in Windsor once again this October as the A-list actor has a connection to the groom.