Prince Philip will celebrate his 99th birthday with a quiet and low-key lunch at Windsor Castle with his wife the Queen.
The couple have been self-isolating at the castle since lockdown was introduced, and the Duke of Edinburgh will spend his special day there on June 10.
The Duke of Edinburgh is never one for a big fuss on his birthday, but the coronavirus restrictions mean he won't be able to see his children, grandchildren of great-grandkids on the big day.
However Prince Charles, Camilla, the Cambridges, Prince Harry, Meghan Markle, Archie and the rest of the royal family will wish him a very happy birthday via Zoom call.
It's also expected that they will release birthday messages and photos on social media to mark the special occasion.
Philip's cousin Myra Butter, 95, explained that he's also had a "no fuss, no bother, approach to his birthday.
She told the Mail : "He still enjoys the greatest role of all, supporting the Queen. As for a party to celebrate turning 99? Goodness me, no! He never wants a fuss, ever!
"The secret is that he just does everything he has previously done, but slower."
Buckingham Palace may also mark the day in some way, but it will "depend on how His Royal Highness feels", reports the Mail.
Prince Philip has suffered a number of health issues in recent years, and was in hospital shortly before Christmas, however he now much better.
The Queen also had a lockdown birthday earlier this year celebrating her 94th year in April.
To mark the day, she shared a private throwback video featuring clips from her childhood, including ones of her playing with sister Princess Margaret, the Queen Mother and her dogs.
There is a video of her playing with a toy pram as a little girl and on a seesaw, as well one of her dancing.
The caption read: "Happy Birthday, Your Majesty!
"Thank you for your messages today, on The Queen’s 94th birthday."
She requested that many of her birthday traditions - including the gun salute and Trooping the Colour - were scrapped this year due to the worldwide health crisis.
Members of the royal family took to social media to mark the day, including Prince William and Kate who shared a photo of themselves with the Monarch along side the caption "Wishing Her Majesty The Queen a very happy 94th Birthday today!" with a balloon and birthday cake emoji.
The photo was taken at the Chelsea Flower Show last year, as Kate gave the Queen a tour of the 'Back to Nature Garden' she designed.