Britain's Queen Elizabeth II and her husband Britain's Prince Philip, Duke of Edinburgh travel by horse-drawn carriage as they arrive on day one of the Royal Ascot horse racing meet, in Ascot, west of London, on June 20, 2017. The five-day meeting is one of the highlights of the horse racing calendar. Horse racing has been held at the famous Berkshire course since 1711 and tradition is a hallmark of the meeting. Top hats and tails remain compulsory in parts of the course while a daily procession of horse-drawn carriages brings the Queen to the course. (AFP/Daniel Leas-Olivas)
Queen Elizabeth II's husband Prince Philip, who recently spent more than a month in hospital and underwent a heart procedure, died on Friday, Buckingham Palace announced. He was 99.
"It is with deep sorrow that Her Majesty The Queen announces the death of her beloved husband, His Royal Highness The Prince Philip, Duke of Edinburgh," it said in a statement.
"His Royal Highness passed away peacefully this morning at Windsor Castle.
"The Royal Family join with people around the world in mourning his loss."
The palace added that further announcements would be made "in due course".
Fears over the health of the Duke of Edinburgh, as he was formally known, had been heightened after he recently spent a month in hospital for treatment.
He left hospital on March 16 following what was described as a successful procedure for a pre-existing condition and treatment for an unspecified infection.
He was first admitted on February 16 on the advice of his doctor after he complained of feeling unwell.
Philip had returned to Windsor Castle, west of London, where he had been isolating with the queen -- Britain's longest-serving monarch -- since the start of the coronavirus pandemic last year.
He was due to turn 100 in June.
The news of his death saw television channels interrupt regular programmes and start special coverage marking his life.
The BBC announced his death and played the national anthem, "God Save the Queen".
Philip had increasingly struggled with his health in recent years, and had retired from public life.
In the run-up to Christmas 2011, Philip was taken to hospital by helicopter after suffering chest pains.
The Greek-born former naval officer was then treated for a blocked coronary artery and had a stent fitted.