Buckingham Palace released this 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."
The statement goes on ... "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."
Prince Philip has had major health issues recently ... he was hospitalized back in February with heart issues.
The Prince had mostly been secluded as of late -- along with the Queen -- not necessarily for direct health issues ... but due to the recent safety precautions regarding the coronavirus pandemic. Philip was at-risk as a very old man with pre-existing conditions.
Philip married Elizabeth in 1947 ... she became Queen in 1952, and he was dubbed a Prince of the UK in 1957.
Philip was born in Greece into the royal families of that country and Denmark. He was raised all over Europe, but joined the British Royal Navy at the age of 18. He served in WWII, and eventually rose to rank of commander until he retired from military service.
He retired from his official royal duties in August 2017 at the age of 96 after 65 years of service.