With three children and a decade of marriage to celebrate, Kate Middleton and Prince William have come a long way since taking their vows back in 2011.
But it's now claimed that they knew they would be getting married long before they made their official announcement in 2010.
Royal expert Katie Nicholl writes in her book how the Cambridges made a deal shortly after their 2007 split that they would marry for good.
In Kate: The Future Queen, it’s claimed that Prince William, 38, told Kate, 39, that he would propose years before their engagement was made known to the public.
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