The Danish King and Queen were the picture of elegance as they welcomed top international dignitaries to a glittering dinner at Kronborg Castle in Helsingor today.

The castle is famously known as the setting for Shakespeare’s Hamlet.

King Frederik X and Queen Mary hosted the prestigious event in honour of the UN Chief Executives Board, the organisation’s highest leadership and coordination body.

The mother-of-four looked ethereal in a flowing, baby blue floral midi dress, featuring a high neck and delicate pleating that caught the evening breeze.

She paired the ensemble with heels and a matching clutch, her brunette locks worn down.

Elsewhere, Frederik donned a tailored dark pinstripe suit with a copper-toned tie, standing proudly beside his wife as they posed for photographers on the cobbled courtyard.

Also in attendance was Danish actor Nikolaj Coster-Waldau, 54, best known for his role in Game of Thrones.

Coster-Waldau, who is also a UNDP Goodwill Ambassador, looked smart in a sharp navy suit and tie as he mingled with guests inside the historic venue.

King Frederik X of Denmark and Queen Mary of Denmark arrived to host an official dinner at Kronborg Castle

The royal couple arrived at Nordre Toldbod to board the royal ship Dannebrog in Copenhagen earlier the same day

Underneath a smart navy wrap blazer, Queen Mary wore a flowing, floral midi dress, featuring a high neck

Also turning heads at the dinner table was Danish supermodel Helena Christensen, 56, who looked striking in a sleek black floral dress.

The gathering at the Renaissance-era castle comes as the King and Queen made the annual move into their summer residence at Fredensborg Castle on Monday.

The couple, who usually stay in Amalienborg, Copenhagen, were all smiles as they took in the sunny weather and were welcomed by wellwishers as well as a brass ensemble.

Frederik X and his wife Mary were both delighted as they received a warm welcome to the palace’s Chancellery House this afternoon.

The mother-of-four was effortlessly elegant in navy trousers and a breezy blue button-down, teamed with a light white coat.

She wore her chestnut tresses down, and opted for a glamorous make-up look for the occasion.

Danish actor Nikolaj Coster-Waldau, of Game Of Thrones, attended the dinner hosted by the Danish royal couple

The 54-year-old looked smart in a sharp navy suit and tie as he arrived at the star-studded event

Also in attendance was Danish model Helena Christensen, 56, who looked striking in a black dress adorned with silver florals

Elsewhere Frederik donned taupe chinos with a pastel blouse, topped with a checkered blazer.

The couple appeared to bring their Border Collie, Coco, along, and looked to be in high spirits as they made their arrival.

Mary held onto a bouquet of flowers as she and her husband both greeted members of the public, and enjoyed chatting.

Taking to social media, the King and Queen wrote: ‘When spring soon turns into summer, and the trees around Fredensborg Castle turn green again, the Royal Family will traditionally move their residence to the Chancellery House.’

Fredensborg was built as a ‘country seat’ for Frederik IV and initially used in 1722, before being rebuilt and expanded.

Now, it is often the setting for ‘important events’ for the family, such as weddings, anniversaries and birthdays.