Kate MiddletonandPrince Williamare making their way intoKing Charles' coronation!

The Prince and Princess of Wales arrived at Westminster Abbey in London on Saturday for the crowning ceremony of King Charles andQueen Camilla. At the request of the King and Queen,Prince Williamand Princess Kate both wore formal robes and mantels for the historic occasion.

Prince William, 40, wore the ceremonial dress uniform of the Welsh Guards. As the Prince of Wales, the traditional title for the heir to the throne, King Charles made him theceremonial Colonel of the Welsh Guardsin December.

PHIL NOBLE/POOL/AFP via Getty Images

Prince William and Catherine, Princess of Wales arrive at Westminster Abbey in central London

The outfit was topped with a Jess Collett x Alexander McQueen headpiece with silver bullion, crystal and silver thread work three-dimensional leaf embroidery.

Kate also wore some sentimental jewels, including pearl and diamond earrings that belonged to her late mother-in-law, Princess Diana. She also wore the George VI Festoon Necklace, a piece made in 1950 at the request of King George VI for his daughter Princess Elizabeth (laterQueen Elizabeth).

The royal couple’s three children —Prince George, 9,Princess Charlotte, 8, andPrince Louis, 5 — also joined their parents at the event. While Princess Charlotte and Prince Louis processed into Westminster Abbey with their parents, Prince George took his place with his grandfather’s three other Pages of Honor.

Prince George and King Charles.David Fisher/Shutterstock

The Coronation of King Charles III, London, UK - 06 May 2023

Thehistoric coronationis especially poignant for the Wales family.Prince William, 40, is heir to the throne andPrince Georgefollows his father as second in theline of succession.Prince Georgeset a new precedent as theyoungest future monarchto be officially involved in a coronation service,The Telegraphreported.

While 4-year-old Prince Charles wasbrought into watch part of his motherQueen Elizabeth’s coronation in 1953 and 11-year-old Princess Elizabeth similarly witnessed the crowning ceremony of her fatherKing George VIin 1937, neither participated in the actual service. The Prince and Princess of Wales' eldest son will serve as aPage of Honorfor his grandfather, King Charles.

Princess Charlotte.Stuart C. Wilson/Getty Images

Princess Charlotte of Wales travelling in the state car during the Coronation of King Charles III and Queen Camilla on May 06, 2023 in London, England

Prince Georgeis poised to take his place alongside Lord Oliver Cholmondeley, the son of the Marquis of Cholmondeley (who was recently named as Charles' Lord-in-Waiting) and his wife Rose — Norfolk neighbors ofPrince Williamand Princess Kate. Nicholas Barclay and Ralph Tollemache are set to serve as King Charles' other two pages.

Jeff Spicer/Getty

Catherine, Princess of Wales and Prince William, Prince of Wales during the Coronation of King Charles III and Queen Camilla on May 06, 2023 in London, England.

Before the big day,Prince George’s involvement in the coronation was a subject of family discussion behind the scenes, as his parents juggled the unique honor with the pressure it might put on their son’s shoulders.

A Kensington Palace spokesperson said, “We’re all very excited aboutPrince George’s role in the coronation, it will be an incredibly special moment.”

RELATED VIDEO: How King Charles and Queen Camilla Made Royal History at Their Coronation

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The Prince and Princess of Wales are “cognizant that he is old enough to understand what’s going on,” a royal source told PEOPLE. But they’re mindful that normal life resumes when George is back at school next week, where the weekend’s events will likely be the talk of his classmates.

“His parents are very excited and delighted that he is a page,” a spokesperson for the Prince and Princess of Wales told PEOPLE. “It’s something that his parents have thought long and hard about and are very much looking forward to — and I’m sure George is too.”

source: people.com