After 70 years of marriage, Queen Elizabeth handed her husband, Prince Philip, a very special honor.
The announcement comes as their closest relatives and friends prepare to toast the couple at a dinner party at Windsor Castle.
Bells rang from Westminster Abbey for more than three hours to mark the couple's milestone anniversary.
Queen Elizabeth II and the Duke of Edinburgh were married on November 20, 1947 just two years after the end of the Second World War.
In their 65 years together, the couple have fulfilled countless royal duties, welcomed four children, eight grandchildren, and four great grandchildren.
For their golden anniversary 20 years ago, the Queen made her famous statement that Philip has been her "strength and stay."
"He is someone who doesn't take easily to compliments but he has, quite simply, been my strength and stay all these years, and I, and his whole family, and this and many other countries, owe him a debt greater than he would ever claim, or we shall ever know," she said.
Previous royal couples have had long-lasting marriages, but Queen Elizabeth is the first monarch to ever reach a platinum anniversary.