Prince Philip, Duke of Edinburgh and Queen Elizabeth II's husband, dies aged 99, Buckingham Palace has announced.
Buckingham Palace said: "It is with deep sorrow that Her Majesty The Queen has announced the death of her beloved husband, His Royal Highness The Prince Philip, Duke of Edinburgh.
"His Royal Highness passed away peacefully this morning at Windsor Castle."
Speaking at Downing Street, the prime minister, Boris Johnson said he "inspired the lives of countless young people".
The Duke was married to Queen Elizabeth II for more than 70 years and became the longest-serving consort in British history. Prince Philip and the Queen had four children, eight grandchildren and 10 great-grandchildren.
Their first son, the Prince of Wales, Prince Charles, was born in 1948, followed by his sister, the Princess Royal, Princess Anne, in 1950, the Duke of York, Prince Andrew, in 1960 and the Earl of Wessex, Prince Edward, in 1964.
Prince Philip was born on the Greek island of Corfu on 10 June 1921. His father was Prince Andrew of Greece and Denmark, a younger son of King George I of the Hellenes. His mother, Princess Alice, was a daughter of Lord Louis Mountbatten and a great-granddaughter of Queen Victoria.