Philip, famously described by the Queen as her “constant strength and guide”, died on April 9 at Windsor Castle, two months before his 100th birthday.
Philip became an international figure when he married the Queen more 70 years ago, and his death was marked with tributes from world leaders, foreign royal families and charities he supported.
The palace said in a statement: “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.
“His Royal Highness passed away peacefully this morning at Windsor Castle.
“Further announcements will be made in due course.
“The Royal Family join with people around the world in mourning his loss.”
An online book of condolence has been opened on the royal family’s official website so the public can post their personal tributes.