The eldest son of Queen Elizabeth II and Prince Philip, His Majesty Charles Philip Arthur George III, now King Charles III was born on November 14 1948.
After living his life as Charles, Prince of Wales and heir to the throne for over 70 years, the now King Charles III is officially the King. Over the years, Charles has had quite the career as a working Royal, championing causes that are very close to his heart.
But how much do you know about him from when he was young? From his first official photos as baby to his marriage to Princess Diana, we take a look back through King Charles' younger years...
King Charles young
1 of 23Queen Elizabeth II holding baby Prince Charles
Princess Elizabeth (later Queen Elizabeth II) holding a then baby King Charles in 1949.
2 of 23Prince Charles and Princess Anne in the Garden of Royal Lodge, Windsor.
King Charles and his sister, Princess Anne, holding a bunch of flowers whilst smiling at the camera in the Garden of Royal Lodge, Windsor.
3 of 23Princess Anne, 4 and Prince Charles,
Princess Anne, 4 and King Charles, 6, walk through Green Park with their Governess on their return to Buckingham Palace after visiting the Queen Mother at Clarence House.
4 of 23Prince Charles and Princess Anne
King Charles and Princess Anne paid a visit to the B.B.C. Lime Grove Studios to see the programme ''Studio E'' on Children's Television. This photo shows King Charles and Princess Anne with David Attenborough and 'Cocky' the Cockatoo.
5 of 23Prince Charles and Princess Anne
King Charles and Princess Anne at a picnic in Malta with their Uncle and Aunt - Lord Mountbatten and Lady Louise.
6 of 23Young King Charles aged 7
A very young Prince Charles aged 7 at Balmoral, Scotland, wearing a kilt.
7 of 23Young Prince Charles in his school uniform.
Young King Charles walking in his school uniform. At the time he was 9 and attending Cheam School in Berkshire. He later went to Prince Philip's former school, Gordonstoun, in Moray, Scotland.
8 of 23National Savings stamps
National Savings stamps were a popular savings scheme aimed at children in the 1950s and 1960s. The stamps were sold in schools and then stuck into savings books. King Charles and Princess Anne were featured on the stamps. King Charles stamp started with a value of one shilling, later increased to half a crown.
9 of 23Charles school
King Charles, accompanied by his father Prince Philip, arriving at Gordonstoun, his new school in Scotland.
10 of 23Prince Charles
How smart does King Charles look in his school photo from Gordonstoun School? He was a student at this school in the 1960s.
11 of 23Prince Charles at Cambridge
Prince Charles walking in Downing Street, Cambridge, UK, 12th October 1967 at the start of his term at Trinity College.
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12 of 23Prince Charles (then aged 19yrs) and his father Prince Philip,
A father and son moment between King Charles (then aged 19yrs) and his father Prince Philip, Duke of Edinburgh during a polo match at Cowdray Park in West Sussex.
13 of 23Queen Elizabeth II family
Queen Elizabeth II at Balmoral with King Charles, Princess Anne, Prince Edward, Prince Andrew and Prince Phillip.
14 of 23Prince Charles and Lady Diana
The engagement of King Charles and Lady Diana Spencer, February 1981.
15 of 23Princess Diana and Prince Charles
Princess Diana and King Charles on the Buckingham Palace balcony during their wedding day on 29 July 1981.
16 of 23Charles with his newborn son
King Charles stepping off of a plane with his newborn son, Prince William, 1982.
17 of 23Prince Charles swimming
King Charles swimming at Cottesloe Beach in Perth Australia, April 1983. This is the year he went on an Australian royal tour with Princess Diana.
18 of 23Prince Harry birth
Prince Harry soon after his birth being held by his mother and father, September 1984. He was born in the same room as Prince William, at the private Lindo Wing.
19 of 23Major Ronald Ferguson and Prince Charles
Major Ronald Ferguson and King Charles at Windsor playing polo in 1986.
20 of 23Young king charles and Prince harry
Prince Charles with a baby Prince Harry, aged one, at home in Kensington Palace.
21 of 23The Prince and Princess of Wales with sons
The King and Princess of Wales with sons Prince William, right, and Prince Harry prepare for a cycling trip in Tresco during their holiday in the Scilly Isles.
22 of 23Young King Charles with his mother Queen Elizabeth
A sweet photo of Prince Charles kissing the late Queen's hand after she presented him with a prize at polo in Windsor, 1985.
23 of 23The Royal Famil
The Royal Family watching a flypast from a balcony at Buckingham Palace to mark the Queens birthday in October 1989.
Features & Reviews Editor Emily Gilbert has been a journalist since 2015 and has worked across a variety of specialist and lifestyle brands both in print and online. Specialising in travel content and product reviews, Emily is the first to know about all the exciting new releases, her favourite being gadgets for the home.