But will they reprise their roles as page boy and flower girl for Princess Eugenie's nuptials? Here's everything you need to know.
Eugenie will have a number of flower girls and page boys when she marries fiancé Jack Brooksbank on October 12.
Princess Charlotte will be a member of the wedding party.
The three-year-old has already played a part in both Meghan and Pippa Middleton's weddings, so she'll know exactly what to do.
Prince George has also nabbed a part in the service.
Similarly to his younger sister, George has been a page boy on a number of occasions.
Traditionally, royal brides walk down the aisle without adult bridesmaids – but Eugenie is bucking the trend.
She's asked her older sister Princess Beatrice to be her maid of honour.
Robbie Williams' daughter Theodora has been confirmed as a flower girl, as Eugenie is close to the singer and his wife Ayda Field.
Eugenie's goddaughter Maud Windsor – who's the daughter of her cousin Freddie Windsor – is poised to take a role.
Peter Phillips' daughters Savannah and Isla will join Eugenie at the chapel, alongside Zara Tindall's four-year-old Mia.
Louis de Givenchy – son of J.P. Morgan executive Olivier de Givenchy – is a page boy, while Prince Edward's children Lady Louise and Viscount Severn are "special attendants".
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