Eagle-eyed wedding viewers will have counted ten bridesmaids and page boys following Meghan down the aisle – but by the end of the ceremony there were two absentees.
All the youngsters were ushered into a side room for the service, but when they came out Charlotte and George – both circled in the "before" photo – seemed to be missing.
However, the pair had actually joined their parents further behind the procession, according to the Daily Mail.
The youngsters were then treated to a show by children's entertainers – booked by Harry and Meghan – at the reception which followed.
"They knew the children would get bored while all the grown-ups were partying so they thought it made sense to have something to occupy the little ones," an aide said.
The boys wore miniature versions of Prince Harry's Blues and Royals frockcoat, made by tailors Dege & Skinner in Savile Row, while the girls were dressed in Givenchy haute couture by Clare Waight Keller, who designed Meghan's dress.
Princess Charlotte captured the hearts' of the nation once again as she waved enthusiastically at crowds outside the Royal wedding. and cheekily stuck out her tongue as she pulled up to the church.
The three-year-old beamed as she gave a confident wave to adoring fans outside St George's Chapel in Windsor.
But her four-year-old brother George was less keen to address the public, cowering behind his father William's legs on the steps in front of the church.
Both Prince William's children were part of the wedding party, with Charlotte a bridesmaid and George a page boy.
The young princess drew attention when she waved enthusiastically as the carriage with Harry and Meghan pulled away.
The Duchess of Cambridge had moments earlier bent down to her daughter and said "look at the carriage", according to lip reader Tina Lannin.
The six little bridesmaids were dressed in pretty frocks and had flowers adorning their hair as they giggled and walked behind Meghan.
Clare Waight Keller, who designed the bridal gown, also designed the bridesmaids' dresses in the Givenchy Haute Couture Atelier in Paris.
They were made of ivory silk radzimir, and were high-waisted with short puff sleeves, hand finished with a double silk ribbon detail tied at the back in a bow.
The bridesmaids' dresses included pockets and pleated skirt.
Each little girl also wore a flower crown chosen by Harry and Meghan, which replicated the flowers used in the bridal bouquet.
They wore white leather Aquazurra shoes, each monogrammed with the bridesmaid's initials, and the wedding date. Kensington Palace said they were a gift from Meghan as a keepsake of the special day.
Charlotte stood smiling as she listened to This Little Light of Mine after Meghan and Harry left the chapel.
Kate helped escort the 10 children into Windsor Castle, as the children were seen excitedly waving and peering out of the vintage Rolls-Royce they arrived in.
The excitement of the royal wedding became too much for one bridesmaid, who started crying moments before Meghan entered the chapel.
The occasion seemed to overwhelm one of the little girls, believed to be the youngest, Zalie Warren.
The two-year-old had to be picked up and comforted by Prince George and Princess Charlotte's nanny before she made her way into the church.
She is one of Prince Harry's goddaughters and the daughter of one of his best friends, Jake Warren, and his wife Zoe.
Harry's other goddaughter, 3-year-old Florence van Cutsem, was also a bridesmaid, as well as Markle's goddaughters, sisters Remi and Rylan Litt, aged six and seven respectively, and four-year-old Ivy Mulroney - the daughter of Meghan's close friend Jessica Mulroney - were bridesmaids.
The other pageboys were Harry's six-year-old godson Jasper Dyer - the son of Harry's mentor Mark Dyer - and Mrs Mulroney's seven-year-old twin sons Brian and John Mulroney.
George was dressed in a black suit and looked more nervous in front of the cameras.
The four page boys had their initials embroidered in gold on their shoulder straps, as their memento.
They wore a miniature version of the Blues and Royals frockcoat that Harry and the Duke of Cambridge wore.
Made from blue doeskin, they were single-breasted with a stand-up collar and figured braiding of Regimental pattern.
Their trousers were made of blue/black wool barathea with three-quarter scarlet stripes fastened with a leather strap. The uniforms were cut and made by the tailors Dege & Skinner in Savile Row.
Guests turned to smile at each other after Meghan and the children made their way past each pew, perhaps approving of the sumptuous bridal gown and ethereal veil or admiring the children carrying out their duties with aplomb.
The nation's hearts melted as Charlotte turned to wave at crowds outside the Lindo Wing at St Mary's Hospital in Paddington last month.
Twitter users commented on her confident air, compared with her older brother's more reserved nature.
She was credited with "stealing the show" from the new Duchess of Sussex, Meghan Markle, 36, and her husband Prince Harry, 33.
People posted on social media that Charlotte "nailed that wave", calling her "adorable" and "a delight".
One user wrote: "Princess Charlotte stole the show at her uncle Harry's wedding #Royalwedding"
Another posted: "Princess Charlotte is a delight! She loves the people and the people love her. God she's just amazing!"