When it came to planning their royal wedding, Princess Elizabeth and her fiancé Prince Philip had a lot of big decisions to make.
At the time of their 1947 wedding, Britain was still recovering from the horrors of the Second World War, and King VI knew he had to be conscious about the budget for his daughter's wedding.
Food, clothing, fuel and coal were still being rationed, and the original plan was for a budget occasion.
However the government decided Brits needed something to celebrate, so the wedding ended up being bigger.
But there was one thing they didn't need to worry about paying for - the Queen's wedding ring.
As is traditional in the royal family, her ring is made from Welsh gold, in a simple style to those worn the Duchess of Cambridge and Meghan Markle.
Her ring has a certain sense of mystery, as it has a secret inscription on the inside - but only three people know what it says.
Writing in her new book Prince Philip: A Portrait of the Duke of Edinburgh, royal expert Ingrid Seward writes: "At least Philip didn't have the expense of a wedding ring, as the people of Wales supplied a nugget of Welsh gold from which the ring as made.
"She never takes it off and inside the ring is an inscription.
"No one knows what it says, other than the engraver, the Queen and her husband."
The Queen's engagement ring also has historical significant, as it is made from a tiara which belonged to Philip's mum, Princess Alice.
It was given to her as a wedding present by Tsar Nicholas II and Tsarina Alexandra of Russia, and came with a stunning set of accompanying jewels.
Ahead of asking the Queen to marry him, Philip had the tiara taken apart and used the diamonds to make a ring.
He designed the three-carat solitaire with five smaller diamonds on either side himself, and gave it to his Princess at Buckingham Palace in the July.
The Queen was said to love her ring, however it was too big and had to be resized.
Elizabeth and Philip tied the knot on November 20, 1947 at Westminster Abbey.
She had eight bridesmaids, including her sister Princess Margaret and Princess Alexandra of Kent.
The couple invited 2,000 guests to their special day, and more than 200million people around the world turned in to watch the service on the BBC.
- Prince Philip: A Portrait of the Duke of Edinburgh is out now, and can be purchased on Amazon for £20.
