King Frederik and Queen Mary of Denmark's Children: All About Their 4 Kids

Their eldest, Prince Christian, is 18 years old.

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A royal first: Australia celebrates Princess Mary's historic rise to be queen in Denmark

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Meet King Frederik and Queen Mary's Children - Vogue Australia

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Crown Princess Mary and her children attended the premiere of 'Peter Pan

Crown Princess Mary and Queen Margrethe just repeat-wore these Danish designers for Prince Christian's 18th birthday - Vogue Scandinavia

Princess Mary and Crown Prince Frederik's sweet family

Queen Mary and King Frederik's sweetest family photos

Meet King Frederik and Queen Mary's Children - Vogue Australia