The Queen and the Duke of Edinburgh have marked their 73rd wedding anniversary by releasing a photograph.
The image shows them opening a card from the Duke and Duchess of Cambridge's children, emblazoned with the number 73 on the front.
In the image, the Queen and Duke are sat on a sofa in Windsor Castle's Oak Room.
The picture also shows a small pile of anniversary cards and letters sent by well-wishers on a nearby table.
Their marriage has lasted the longest of any British sovereign.
The monarch, 94, was a 21-year-old princess when she married Lieutenant Philip Mountbatten, then a Royal Navy officer, at Westminster Abbey on 20 November 1947.
The Queen and Prince Philip, who has retired from public duties, are spending the lockdown in England isolating at Windsor Castle, and anniversary celebrations are expected to be low-key.
In the new photograph, the Queen is wearing the same chrysanthemum brooch she had on when she was photographed on her honeymoon in Hampshire, as well as in images released to mark the couple’s 60th wedding anniversary in 2007.
Together, the Queen and the Duke of Edinburgh have celebrated the silver, golden and diamond jubilees of the Queen’s reign.
On their golden wedding anniversary in 1997, the Queen paid a tribute to her husband, saying: "He has, quite simply, been my strength and stay all these years."
Philip used the occasion to praise the Queen for her abundance of tolerance.
"I think the main lesson that we have learnt is that tolerance is the one essential ingredient of any happy marriage," he said.
As a result of the coronavirus pandemic, royal events moved online during the first national lockdown, with the Queen holding virtual engagements via video calls and meetings by phone.
This year Prince Philip celebrated his 99th birthday on 10 June.
Because of the pandemic, the birthday was celebrated in a low-key fashion at Windsor Castle.
The Queen And Prince Philip With The Military
Both the Queen and Prince Philip have a close connection to the Armed Forces.
As sovereign, the Queen is the Head of the Armed Forces.
Her relationship with the military began when she was still Princess Elizabeth during World War Two.
She joined the Auxiliary Territorial Service (ATS) in 1945, becoming the first female member of the Royal Family to join the Armed Services as a full-time active member.
Currently, she holds various appointments and honorary ranks within the Armed Forces.
Similarly, the Duke of Edinburgh remains very close to the Armed Forces.
He served as an officer in the Royal Navy until July 1951 and was appointed Admiral of the Sea Cadet Corps, Colonel-in-Chief of the Army Cadet Force and Air Commodore-in-Chief of the Air Training Corps in 1952.
The following year, Prince Philip was promoted to Admiral of the Fleet and appointed Field Marshal and Marshal of the Royal Air Force.
On his 90th birthday in 2011, he was appointed Lord High Admiral by the Queen.
In 2017, he was succeeded as Captain General Royal Marines, a position he had held since 1953, by his grandson, Prince Harry.
In July of this year, he handed over his role as Colonel-in-Chief of The Rifles to the Duchess of Cornwall during a rare public appearance.
Cover image: The Queen and Prince Philip in a photo released to mark their 73rd wedding anniversary (Picture: Chris Jackson/Getty Images).