The United Kingdom's Prince Philip has died. He was 99. Philip, the Duke of Edinburgh, is survived by wife Queen Elizabeth II, their eldest son and her heir Prince Charles, sons Prince Andrew and Prince Edward, daughter Princess Anne, eight grandchildren – including Charles' sons Prince William and Prince Harry, and nine great-grandchildren. The royal family announced his passing on April 9. "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," the statement read. "His Royal Highness passed away peacefully this morning at Windsor Castle. The Royal Family joins with people around the world in mourning his loss." Philip was hospitalised in London weeks before his death. He was admitted to a London hospital on Feb. 16 after feeling unwell and was treated for an infection. Last November, Buckingham Palace released the last official photo of the duke.