Because, in Mamma Mia 2, we learn that they didn’t just know about it: they met both Sam and Bill (not Harry, though – more on that momentarily) when they were visiting Donna in Kalokairi.

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Alongside the image of Archie and Lilibet running into their parents' arms, the family's rescue dog, Mamma Mia, can also be seen. Harry and Meghan adopted their rescue pooch in August 2022 ...