Their eldest, Prince Christian, is 18 years old.
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Crown Prince Frederik of Denmark (R), his wife Crown Princess Mary of Denmark (L) and their children Prince Christian (2-R) and Princess Isabella (2-L) smile in Grasten, Denmark, 03 August 2007. Grasten
2,320 Prince Frederik Children Stock Photos, High-Res Pictures, and Images - Getty Images
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Queen Mary and King Frederik's children: Everything to know about their four children, including Prince Christian
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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
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