Princess Eugenie has chosen six bridesmaids, two pageboys, and two special attendants to join her bridal party in St George’s Chapel.
Here’s a guide to who’s who among the young helpers at Friday’s royal wedding.
The Duke and Duchess of Cambridge’s middle child may only be three-years-old but she is a seasoned pro at being a bridesmaid, and attending high-profile royal events.
At the Duke and Duchess of Sussex’s wedding the playful fourth in line to the throne, who has confidently mastered the royal wave, stuck out her tongue as she arrived by car.
At Prince Louis’s christening she was heard telling off photographers and declaring they were not allowed inside.
Peter and Autumn Phillips’ seven-year-old daughter is the Queen’s eldest great-grandchild.
She is not entitled to a royal title and she and her sister are usually kept out of the limelight – spotted mostly with their parents at horse trials.
She was seen pushing Prince George down a grassy bank at the polo, and also clasping her hand over his mouth as the national anthem was played while they were on the Buckingham Palace balcony for Trooping The Colour.
Her father Peter Phillips – the Princess Royal’s son – organised a mass tribute to the Queen on The Mall for her official 90th birthday in 2016.
Savannah’s younger sister Isla is six-years-old and was born in the Queen’s diamond jubilee year of 2012.
Her middle name is Elizabeth in honour of her great-grandmother.
Mia’s parents are former England rugby star Mike Tindall and Zara Tindall, the Olympic medal-winning horsewoman and daughter of the Princess Royal.
The four-year-old has a reputation for being mischievous, and is often spotted playing with her cousins and father at horse trials.
As a one-year-old, she was seen having a tantrum – crying and stamping her feet when Zara pulled her away from an electric generator during the Festival Of British Eventing in Gloucestershire.
During a portrait shoot for the Queen’s 90th birthday, she had the privilege of holding her great-grandmother’s classic black handbag.
Like her cousins Savannah and Isla, she is not an HRH nor does she have a title.
Five-year-old Maud is Eugenie’s goddaughter, and the granddaughter of the Queen’s cousin Prince Michael of Kent and his wife Princess Michael.
She is a classmate of Prince George.
Her parents are Lord Freddie Windsor and Lady Frederick Windsor, also known as the actress Sophie Winkleman – the-half sister of Strictly host Claudia Winkleman.
Sophie was seriously injuried in a car crash last year.
Theodora, daughter of pop star Robbie Williams and his fellow X-factor judge and wife Ayda, is six-years-old.
The youngster, who is affectionately known as Teddy, is usually kept out of the limelight by her celebrity parents, who choose not to show her face in social media posts.
Williams spoke of his pride at being a father after Teddy was born.
“Your world changes for the better – she’s an absolute gift, she’s an absolute joy,” he said. “I absolutely adore being a dad.”
A future king – George is the eldest of the Cambridge children.
The five-year-old third in line to the throne loves helicopters and all things police related, and was even spotted at the polo playing with a toy gun.
He is in his second year at private school Thomas’s Battersea.
George is seen as more shy than his younger sister Charlotte, appearing occasionally a little reluctant in front of the cameras.
Louis de Givenchy
Louis de Givenchy is the six-year-old son of JP Morgan banking executive Olivier de Givenchy and his wife Zoe.
The couple are friends of Eugenie and her fiance Jack Brooksbank.
Lady Louise Mountbatten-Windsor
Fourteen-year-old Lady Louise, the Queen’s second-youngest grandchild, was a bridesmaid to William and Kate in 2011.
As the daughter of the son of the sovereign, she is actually entitled to use the style princess.
But the Earl and Countess of Wessex decided against this, choosing the courtesy titles of a child of an Earl for their daughter and son instead.
Lady Louise occasionally accompanies her mother at events, and attends royal celebrations such as Trooping The Colour.
— The Royal Family (@RoyalFamily) August 5, 2018
She was born prematurely in 2003, weighing just 4lbs 9oz.
Lady Louise underwent successful surgery a couple of years ago to correct an eye condition.
The teenager has started competing at carriage driving, following in the footsteps of her grandfather the Duke of Edinburgh by taking up the sport.
She sees a good deal of her grandmother the Queen, to whom she bears a strong resemblance at the same age.
James, 10, is Edward and Sophie’s son and the Queen’s youngest grandchild.
He was born in 2007 and was the first Windsor baby to wear the replica royal christening gown, subsequently used for George, Charlotte and Prince Louis.
James and sister Louise live in the Wessex family home, Bagshot Park in Surrey.
Close to his grandmother, he and his older sister often join the Queen horse riding in Windsor Great Park.