Prince Philip has died aged 99, Buckingham Palace has announced this morning.
"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."
The prince married the queen in 1947 when she was still Princess Elizabeth. She became queen five years later.
The prince was the longest-serving royal consort in British history.
Prince Philip had been battling health troubles for some time. In February he was admitted to hospital, spending a month there for treatment for a pre-existing heart condition.
Prince Philip and Queen Elizabeth II had four children, eight grandchildren and 10 great-grandchildren.
Charles, Prince of Wales, their first son, was born in 1948. His sister, the Princess Royal, Princess Anne, was born in 1950, followed by the Duke of York, Prince Andrew, in 1960 and the Earl of Wessex, Prince Edward, in 1964.
Born on the Greek island of Corfu on June 10, 1921, Prince Philip was the son of 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.