A Scots woman was amongst the first people to receive a birthday cars from the King and Queen Consort.
Glasgow-born Ruth Park-Pearson said she plans to display the signed card from Charles and Camilla on her cabinet.
Mrs Park-Pearson, who has six children, 13 grandchildren and 25 great-grandchildren, turned 100-years-old on Friday.
The greeting said: “My wife and I are so pleased to know that you celebrated your one hundredth birthday on 21st of October 2022.
“This brings our warmest congratulations and heartfelt good wishes on such a special occasion.”
The card features a photograph of the smiling royal couple, which was taken in the summer of 2018.
Charles became King on the death of his mother, the Queen, on September 8.
Mrs Park-Pearson, who lives in Tadcaster, North Yorkshire, said: “I was like ‘my goodness me’.
“It’s lovely because it’s got a lovely gold cord through it with a tassel on the end.
“It really is a lovely card; I shall keep it very prominent so everyone can see it.”
She celebrated her milestone birthday surrounded by family and said the special event brought them all together.
She said: “Everybody seems to have just gelled all together, you know, the cousins haven’t seen each other for years but they all just gelled nicely together.
“Even the young great-grandchildren were happy to be with one another.
“So it was a really happy day.
“I really had a wonderful birthday I have to say.
“So many wonderful presents and flowers, I could start a flower shop almost.”
Mrs-Park-Pearson served in the Women’s Royal Naval Service (Wrens) during the Second World War when Charles’ grandfather, King George VI was on the throne.
Mrs Park-Pearson said: “I was serving under her father if you think about it.”
She added: “You don’t think about it at the time, it’s not until later you realise just sort of how old you are suddenly. You think my goodness me; I remember the old King.
“The Queen Mother was a very elegant lady.”
Queen Elizabeth II reigned from 1952 until her death in September, after marking her Platinum Jubilee.
During her 70-year reign, approximately 1.3 million cards were sent to mark birthdays and anniversaries across the UK, the Realms and the Overseas Territories.
The tradition of sending royal messages to mark significant birthdays and anniversaries dates back to 1917 during the reign of George V, when those celebrating their 100th birthday or 60th wedding anniversary were sent a telegram of good wishes from the king.
Thousands of birthday and wedding anniversary cards are sent from Buckingham Palace every year to those celebrating their 100th and 105th birthday and every year thereafter.
They are also sent to those celebrating their 60th, 65th, 70th wedding anniversaries and every year thereafter.