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

Their eldest, Prince Christian, is 18 years old.

2,244 Princess Isabella Of Denmark Photos & High Res Pictures - Getty Images

Princess Mary and Crown Prince Frederik's sweet family

Prince Frederik and Danish royals losing privacy

Queen Margrethe has called Mary and Frederik 'a credit to Denmark

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Australia's Princess Mary will become Queen of Denmark when her husband Frederik becomes King on January 14.

King Frederik, Queen Mary fly abroad to celebrate Easter holiday

Queen Margrethe has called Mary and Frederik 'a credit to Denmark

How does a woman from Hobart end up a Danish Queen? Everything you need to know about Mary, Australia news

7 things you might not know about Prince Frederik: Denmark's future king

Danish royal family: Who are Princess Mary and Prince Frederik's children?