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Kate Middleton officially became a duchess after marrying Prince William in 2011.
At least that's how Mary Elizabeth Donaldson, now the crown princess of Denmark, found her prince.
And then there's Kate Middleton. Her 2011 wedding to Prince William captivated millions of people around the globe. The two of them met in college.
We've rounded up 18 commoners who married into royal families (and an explainer for why Princess Diana isn't one of them):