Philip proposed to Elizabeth with a ring made of a centre stone surrounding 10 smaller diamonds taken from a tiara that belonged to Philips mother, Princess Alice.
Their wedding occurred in 1947, and Prince Philip was given the title, Duke of Edinburgh.
'Frequently we have discussed my intended speech beforehand and, as you will imagine, his views have been expressed in a forthright manner.
'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.'
The couple then celebrated their 70th wedding anniversary in November 2017.
To celebrate, the royal family released new portraits of the pair taken by British portrait photographer Matt Holyoak.
The images show the couple in the White Drawing Room at Windsor Castle.
The Queen wore a yellow gold broach that Philip gave her decades ago in 1966.