The Duchess of Kent has sadly died at the age of 92.
Buckingham Palace announced the news in a statement, which read: "It is with deep sorrow that Buckingham Palace announces the death of Her Royal Highness The Duchess of Kent," per Sky News.
"Her Royal Highness passed away peacefully last night at Kensington Palace, surrounded by her family," they continued.
"The King and Queen and all Members of The Royal Family join The Duke of Kent, his children and grandchildren in mourning their loss and remembering fondly The Duchess's life-long devotion to all the organisations with which she was associated, her passion for music and her empathy for young people," the statement concluded.
Katharine, who was the oldest member of the Royal Family, was married to Prince Edward, the Duke of Kent, a first cousin of the late Queen Elizabeth II.
She became a familiar figure at Wimbledon over the years, presenting trophies at the championships and comforting players who fell short of victory.
In one of the most memorable moments of her public life, she consoled a tearful Jana Novotna in 1993 after her heartbreaking loss.
Later in life, Katharine stepped back from royal duties. She chose to be known simply as Mrs Kent, gave up the HRH style, and devoted more than a decade to teaching music at a state primary school in Hull.
As news of her passing spread, the Union flag at Buckingham Palace was lowered to half-mast at midday. A formal announcement of her death will also be posted on the palace railings as a mark of respect.