Princess Beatrice and Edoardo Mapelli Mozzi are all smiles as they join his mother – and her prestigious sculptor husband – for dinner in Mayfair

Princess Beatrice was the vision of elegance in a burgundy ensemble as she joined her husband and in-laws for dinner.

The royal, 35, and Edoardo Mapelli Mozzi, 40, were all smiles as they left Arlington restaurant in Mayfair on Wednesday evening.

They appeared in good spirits after enjoying the evening with Nikki Williams-Ellis MBE – Edo’s mother – and her husband David Williams-Ellis.

For last night’s outing, the King’s niece wore a deep purple coat with golden buttons over a sophisticated black top and maxi skirt.

The outfit was cinched at the waist with a belt, and Beatrice completed the look with some simple heels.

She styled her caramel tresses in relaxed waves, and opted for a minimal make-up look.

Elsewhere, Edo opted for a simple white button-up, black blazer and khaki trousers.

He carried an umbrella to shield himself from potential rain, holding hands with his wife as they exited the restaurant.

Meanwhile his glamorous mother donned a bohemian print dress and suede jacket for their dinner.

David – who is Nikki’s third husband- has become the go-to sculptor for high society, with Tatler calling one of his pieces ‘the ultimate marker of taste’.

The Northern Ireland born artist, who was educated at the Stowe School in Buckinghamshire, is also the great-nephew of Clough Williams-Ellis, the Welsh architect known chiefly as the creator of the Italianate village of Portmeirion in North Wales – famed as where The Prisoner was filmed.

Meanwhile, Nikki’s first husband, Edo’s father, is a member of Italian nobility and former British Olympic skier his dual Italian and British citizenship.

His former wife, three-times married Nikki, mixes in English high society and gained an MBE for ‘political service’ when David Cameron announced his honours list after leaving Number 10 in 2016

The couple divorced when their son and his sister Natalie were young, with Nikki now wed to David following the tragic death of her second husband Christopher Shale in 2011 at the age of 56.

Christopher was a senior Tory and a close friend of former prime minister David Cameron. He collapsed and died in 2011 at Glastonbury Festival, after going missing for about 18 hours before he was found in a cubicle in the VIP area.

An inquest subsequently found he had been suffering from undiagnosed heart disease resulting from high blood pressure.

So devoted was Edo to his stepfather that he named his son Christopher, with ex partner Dara Huang, after him.

At the time, a distraught then- Prime Minister David Cameron said: ‘A big rock in my life has suddenly been rolled away.