Karwai TangGetty Images Royal watchers and public figures around the world are reacting to the news of Prince Philip's death. The Duke of Edinburgh and husband to Queen Elizabeth II for more than 70 years passed away at age 99 this morning (Friday, April 9), Buckingham Palace confirmed. "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 palace said in a statement. "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."