Prince George and Princess Charlotte go on tour

At the ripe old ages of three and two respectively, Prince George and Princess Charlotte have just embarked on a tour of Poland and Germany.

First stop: Warsaw.

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The two mini royals and the Duke and Duchess of Cambridge touched down in the Polish capital on Monday afternoon.

As always, they looked picture-perfect - and if you look carefully, you’ll realise their outfits have a common theme. 

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The family of four gave a sartorial nod to Poland’s national colour, red, through Prince William’s tie, Catherine’s ruby necklace, Charlotte’s dress and George’s plaid shirt. 

That’s von Trapp levels of coordinated family dressing right there.

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Upon their arrival, the little prince and princess were welcomed with a gift of three Polish children’s books.

While Prince George didn't look overly excited about attending to his diplomatic duties - his unenthusiastic facial expressions have become something of a trademark - Charlotte was a little more obliging, offering a royal wave.

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This is the second time the royals have toured internationally as a family of four.

Last year, they travelled to Canada for a week-long tour - you might recall this is where Princess Charlotte’s fascination with balloons became world-famous.

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The Duke and Duchess announced their decision to take their children on the five-day tour of Poland and Germany last month.

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“They look forward to a busy and impactful tour and are grateful that they will have the opportunity to meet the Polish and German people — such important friends of the United Kingdom — as a family.”

The family will travel to Germany on Wednesday.