Tender moments as Prince Haakon and Mette-Marit celebrate 40th birthdays with family photos

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Tender moments as Prince Haakon and Mette-Marit celebrate 40th birthdays with family photos

The couple have three children, Princess Ingrid Alexandra, Prince Sverre Magnus and Marius Borg Høiby, Mette-Marit's teenage son from a previous relationship. Photo: © PA