Their eldest, Prince Christian, is 18 years old.
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Danish royal children to spend three months in Switzerland
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Frederik X: Denmark has new King as Queen Margrethe II abdicates in historic moment for Europe's oldest monarchy, World News
Who is Prince Christian? Meet Queen Mary's royal baby turned Denmark's teenage heir to the throne - ABC News
Queen Mary and King Frederik's children: Everything to know about their four children, including Prince Christian
Danish royal family: Who are Princess Mary and Prince Frederik's children?
Danish Princess Mary, Prince Frederik reunite in NZ's Queenstown for family holiday - NZ Herald
They all tease Princess Mary about her Aussie accent and one child has a name that means 'earwax'! Meet the new First Family of Denmark
