We look back at Catherine, Princess of Wales, and Queen Mary of Denmark's best 'style sister' moments through the years.

It was a glimmering event for Queen Mary in Copenhagen this past week in more ways than one: She and her husband King ...

The Danish royals are visiting their Nordic neighbours to strengthen the relationship between the two countries ...

Queen Mary of Denmark wore the same Jenny Packham gown previously worn by Kate Middleton to the royal ball in Copenhagen. The ...

In true Princess Kate style, Mary teamed her suit with swishy hair and suede pointed-toe stilettos. Queen Mary hosted the ...

On Feb. 28, Queen Mary and King Frederik hosted an Arts and Culture Ball at Christiansborg Palace in Copenhagen, continuing a ...

Kate Middleton and Queen Mary of Denmark are both undeniably high among the ranks of the most stylish royal women, so it’s ...

Queen Mary of Denmark captivated royal fans as she graced the annual Evening Party for Art and Culture in a dazzling ...

Queen Mary and Kate Middleton have been dubbed ‘style twins’ for their similar taste in royal fashion – and at a gala ball in ...

Queen Mary and Kate Middleton are often compared for their similar looks and fashion sense, and the Danish Queen’s latest ...

Queen Mary of Denmark channeled her inner Princess Kate as she stepped out in a glittering blush-hued gown by a favoured ...

Queen Mary of Denmark dazzled in a gown previously worn by the Princess of Wales at her annual Evening Party for Art and ...