kate middleton
Catherine, Duchess of Cambridge, (L) arrives with Belgian Countess Stephanie de Lannoy in Luxembourg JOHN THYS/AFP/Getty Images

Kate Middleton was a vision in pastel blue when she stepped out in sunny Luxembourg for her second ever solo visit overseas for a royal engagement.

The 35-year-old Duchess of Cambridge looked resplendent in her A-line wrap coat dress by British designer Emilia Wickstead, which she paired with nude accessories including patent court shoes and a textured clutch. She added the final touches to her look with a pair of blue topaz and diamond drop earrings by Kiki McDonough which retail at £3,500.

Middleton is visiting the small European country to celebrate the 1867 Treaty of London. She began the 150th anniversary commemorations with a visit to the Musze d'Art Moderne accompanied by Crown Princess Stephanie, who also looked chic in a ruffled red wrap dress.

The mother-of-two is set to attend a series of engagement to celebrate the cultural and historic ties between the UK and Luxembourg and was greeted by huge crowds of people outside the art museum Mudam.

Kensington Palace also shared an adorable picture of two little six-year-old twin boys, Gabriel and Charles, get ready to present the duchess and Princess Stephanie with bouquets of posies.

At the museum, Middleton was shown around current exhibitions by British artists Sir Tony Cragg and Darren Almond before hearing about iconic works of art.

Middleton will join Luxembourg's prime minister Xavier Bettel at the Drai Eechelen Museum for an event.

The visit is said to be interpreted as another trip being made by a member of the British Royal Family in their role as 'Brexit Ambassadors' – dubbed by the media.

kate middleton
kate middleton

Middleton previously visited Paris in March earlier this year with husband William in the first in a series of European tours by the monarchy set to strengthen ties with Europe.

In July this year, the Duke and Duchess of Cambridge will visit Poland and one of the leading EU nations, Germany.

Despite being a small nation, Luxembourg has evolved into a thriving financial centre following the depression of its iron and steel industries, and is surrounded by Belgium, France and Germany.

kate middleton
kate middleton
duchess of cambrudge
Duchess of Cambridge JOHN THYS/AFP/Getty Images