Queen Elizabeth and Prince Philip's marriage was a cornerstone of the monarch's 70-year reign . After tying the knot in November 1947, Elizabeth and Philip remained together until the prince's death in April 2021. And according to one royal biographer , Queen Elizabeth believed she owed a huge "debt" to her husband. In his book The Queen: 70 Chapters in the Life of Queen Elizabeth II , author Ian Lloyd shared, "Neither of them was ever comfortable wearing their hearts on their sleeves but on the day they celebrated their Golden Wedding in November 1997, The Queen paid a rare public tribute to her husband." Per Lloyd, Elizabeth said of her husband, "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." "He is someone who doesn't take easily to compliments but he has, quite simply, been my strength and stay…