It was a love story that played out in front of the world across seven decades. And with it, the world saw a couple who couldn't take their eyes off each other.
Queen Elizabeth, 94, and Philip celebrated their 73rd wedding anniversary in November 2020, marking a marriage that lasted longer than any other in the history of the British monarchy.
Elizabeth was just 13 in 1939 when, on a family trip, she spotted Philip, an 18-year-old Greek and Danish prince.
Philip was about to enlist in the Royal Navy, and World War II ended up stalling their in-person courtship.
But their romance flourished all the same. Throughout Philip's service, the couple courted each other through letters, and when the prince returned, he asked King George VI for his daughter's hand in marriage.
Elizabeth, then 21, married Philip on Nov. 20, 1947. Their wedding, which took place at Westminster Abbey, was broadcast on the radio around the world.
After spending the first years of their marriage in Malta, where Philip was stationed as a naval officer, the couple returned to England when King George VI died. The princess became the new monarch in 1953.
"This was something that was revolutionary, frankly," British historian Andrew Roberts told TODAY. "He was a man who was a highly competitive person and for the whole of the rest of (his) life, he's got to stand two or three paces behind the most famous woman in the world."
The couple started a family and went on to have four children, Charles, Prince of Wales; Anne, Princess Royal; Prince Andrew, Duke of York; and Prince Edward, Earl of Wessex.
Over the decades, they danced together, met heads of state, hosted countless garden parties and enjoyed their shared love for sports.
Like all couples, Elizabeth and Philip had a relationship filled with joy and some rough patches, too. In one speech, Philip spoke out about the key to keeping their bond strong.
“Tolerance is the one central ingredient of any happy marriage — it may be not so important when things are going well but it is absolutely vital when things get difficult," he said.
"You can take it from me, the queen has the quality of tolerance in abundance," he added, prompting laughs from the crowd.
The queen was clearly enamored with her husband and once called him her "strength and stay all" on their golden wedding anniversary in 1997.
Philip is survived by his wife, four children, eight grandchildren and 10 great-grandchildren.