Brits celebrating their 100th and 105th birthdays have become the first in the country to receive cards from the new King and Queen Consort.
Hundreds of those celebrating the landmark ages across the United Kingdom have heard from the monarch to wish them happy returns.
The posting of messages to mark significant birthdays and anniversaries is a tradition dating to 1917 and the reign of King George V.
Among those to hear from King Charles are several veterans of the Second World War, including Ruth Park-Pearson, who was born in Glasgow in 1922 and served in the Women's Royal Naval Service.
Now living in North Yorkshire, Ruth celebrated her 100th birthday on Friday, 21st October, surrounded by many of her six children, 13 grandchildren and 25 great-grandchildren.
The photograph adorning the card received by those celebrating their birthdays was taken of The King and The Queen Consort in the summer of 2018.
Thousands of birthday cards are sent from Buckingham Palace every year to those celebrating their 100th and 105th birthday and every year thereafter.
Couples celebrating their 60th, 65th and 70th wedding anniversaries can also look forward to hearing from the monarch.
During Queen Elizabeth II’s long reign, around 1.3 million cards were sent to mark birthdays and anniversaries across the UK, the Realms and the Overseas Territories.
The first missives sent by King George V were delivered by telegram.
In September, a five-year-old boy was among those to receive one of the last letters sent out by the Queen, a day after her death.
James McConnell wrote a heartfelt letter to the late monarch during a trip with his family to London during the Platinum Jubilee.
His dad Graeme McConnell was stunned when James received a card from Buckingham Palace on Friday 9 September, a day after Elizabeth II passed away.
The birthday and anniversary cards are the latest roles the new king has taken over from his late mother.
Last month the Royal Mint unveiled the official effigy of King Charles III which will feature on the new coins coming into circulation.
The first coins to bear the King’s portrait will be a special £5 crown and a 50p piece commemorating the life of Queen Elizabeth II.
Charles’s likeness was created by sculptor Martin Jennings from a photograph and has been personally approved by His Majesty.
In keeping with tradition, the King’s portrait faces to the left, the opposite direction from his mother who faced right. the Queen’s father, George VI, faced left before her.
