Here is a who's who of their eight Pages of Honour, who will form part of the procession through the Nave of Westminster Abbey on 6 May.
Prince George of Wales
Prince George Alexander Louis was born on 22 July 2013 at the Lindo Wing at St Mary's Hospital, London.
Having begun his formal education at Westacre Montessori Nursery in Norfolk, George then started school at Thomas's in Battersea in 2017 and was a pupil there, until the Waleses moved to Adelaide Cottage in Windsor last summer.
The Prince's public appearances have increased in recent years, with appearances at a Thanksgiving service for Prince Philip last March and at Queen Elizabeth II's Platinum Jubilee celebrations last year. Take a look back at George, Charlotte and Louis making their carriage debut at Trooping the Colour 2022...
George and Charlotte also attended the state funeral of their late great-grandmother.
Lord Oliver Cholmondeley
The 13-year-old is the son of David Cholmondeley, 7th Marquess of Cholmondeley (Lord Cholmondeley) and Rose Hanbury, who are close family friends of the King and the Prince and Princess of Wales.
Lord Cholmondeley is a British peer and filmmaker, who acted as Lord Great Chamberlain of the UK from 1990 to 2022.
Rose's maternal grandmother was the late Lady Elizabeth Lambart, who was one of the late Queen's bridesmaids at her 1947 wedding to Prince Philip.
The family reside at Houghton Hall, a Grade I listed property close to the Sandringham estate, which is surrounded by a 1,000 acres of parkland.
Lord Oliver has a twin brother, Alexander, who is heir apparent to the Marquessate and bears the courtesy title of Earl of Rocksavage. The twins also have a younger sister, Lady Iris, who was born in 2016.
Master Nicholas Barclay
Nicholas, 13, is the son of Rose Trouton and solicitor Piers Barclay. Rose is one of the King's godchildren and is the daughter of Colman's Mustard heir, Sarah Troughton.
Sarah, 69, is the King's second cousin and served as lady-in-waiting to Katharine, Duchess of Kent for ten years. In 2022, she became one of the six women appointed as Queen's Companions to Queen Consort Camilla.
Master Ralph Tollemache
Ralph, 12, is the eldest son of Edward and Sophie Tollemache. British aristocrat and banker Edward is the heir apparent of Timothy Tollemache, 5th Baron Tollemache.
Edward counts Charles among his godparents and he was also a Page of Honour to the late Queen from 1988 to 1990.
Charles also attended Edward and Sophie's wedding in Knightsbridge in 2007.
Master Gus and Master Louis Lopes
Camilla's 13-year-old grandsons are the twin sons of Laura Lopes and her husband, Harry.
Their older sister, Eliza, was given a starring role as bridesmaid at Prince William and Kate's 2011 royal wedding
Master Freddy Parker Bowles
Camilla's grandson Freddy, 13, is the son of Tom Parker Bowles and his former wife, Sara Buys. The couple also share a daughter Lola.
Tom is best known as a food critic and has written several cookery books.
Master Arthur Elliot
Arthur, ten, is the son of Camilla's nephew, Ben Elliot and his wife, Mary-Clare Winwood.
Ben, who served as Co-Chairman of the Conservative Party from 2019 to 2022, is the son of Camilla's sister, Annabel, who is an interior designer and antiques dealer.
LISTEN: Why King Charles is being strict with the coronation guest list
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