Princess Beatrice looked striking in crimson at last night’s star-studded event for a charity established by the Queen’s late brother.

She arrived solo, without her husband Edoardo Mapelli Mozzi, at the Royal Botanic Gardens in Kew, west London, to attend a reception and awards ceremony hosted by the charity Elephant Family.

The Duke and Duchess of York‘s daughter wore a floor-length Rebecca Vallance gown, made of metallic brocade and featuring a subtle floral print.

Her £960 belted dress was a deep shade of crimson and she paired the look with a white satin Tyler Ellis clutch and dark red court heels.

Accessorising the elegant outfit were bedazzled jewels, as the 36-year-old donned staggering diamond rings and a matching pair of floral-shaped diamond earrings.

By way of dressing down the regal look, the beaming princess wore her hair down as she arrived for the occasion, which was also attended by the King and Queen.

The foundation works in partnership with conservation experts to preserve Asia’s wildlife, and was set up by Queen Camilla’s brother Mark Shand in 2002. Shand died in 2014, aged 62, after falling and sustaining a head injury.

Princess Beatrice arrived in a stunning £960 floor-length crimson gown by Rebecca Vallance

Princess Beatrice arrived in a stunning £960 floor-length crimson gown by Rebecca Vallance

In his honour, the event’s more than 250 guests were shown videos of the Queen’s brother.

Also in attendance yesterday evening were King Charles and Queen Camilla, who was brought to tears as she watched a posthumous recording of her brother in which he spoke of his ‘optimism’ for saving endangered animals.

The 77-year-old Queen wore a cream tunic top with gold embroidery and matching cream palazzo trousers by designer Anna Valentine.

And Camilla was joined by her sister Annabel Elliot, for the glittering soiree.

The illustrious guest list included Lady Marina Windsor, Ronaldo Nazario, the Brazilian footballer, actors Ed Westwick and Amy Jackson and Sophie Ellis-Bexter.

In an impromptu speech the King, who accompanied his wife as joint president of the charity, which is now part of Charles’s British Asian Trust, said ‘collaboration is far better than conflict’.

Wearing a tie with an elephant motif, he told guests: ‘This evening is an opportunity to pay a special tribute to all the wonderful people who are doing all the work on the ground in India to rescue not just elephants now, but even more species as the trust and the Family develop an even greater ability to manage the human and animal conflict.

‘And it seems to me that this is a great example of why collaboration is far better than conflict and also why, if we’re doing to rescue this poor planet from continuing degradation and restore some harmony to the proceedings, we must also understand that whatever we take and exploit from nature we need to give something back in return to enable nature to sustain us.’

The royal attended the glamorous event without her husband Edoardo Mapelli Mozzi

The royal attended the glamorous event without her husband Edoardo Mapelli Mozzi

Beatrice paired her striking outfit with a bedazzled set of floral diamond earrings

Beatrice paired her striking outfit with a bedazzled set of floral diamond earrings

Giving the sweeping dress a more casual dressing down, the Princess let her brunette her fall over her shoulders

Giving the sweeping dress a more casual dressing down, the Princess let her brunette her fall over her shoulders

King Charles and Queen Camilla attended the reception and awards ceremony, and Charles even delivered an impromptu speech

King Charles and Queen Camilla attended the reception and awards ceremony, and Charles even delivered an impromptu speech

The Queen became emotional as a video of her late brother and founder of Elephant Family charity Mark Shand was played

The Queen became emotional as a video of her late brother and founder of Elephant Family charity Mark Shand was played

Brazilian footballer Ronaldo Nazario posed for snaps with his wife, model Celina Locks

Brazilian footballer Ronaldo Nazario posed for snaps with his wife, model Celina Locks

Guests arrived at the Temperate Gate of the Kew Gardens where they were met by a stilt walker dressed as a peacock.

The King and Queen attended a private reception for 50 guests held at the Marianne North Gallery.

They then walked down an avenue flanked by 30 egg sculptures which were part of the Big Egg Hunt, whereby 123 eggs were placed along a public trail across London to publicise the wildlife charity.

Eggs were placed at landmarks including Buckingham Palace, Battersea Power Station and Canary Wharf.

One artist, who had created a union flag egg adorned with the words ‘God Save the Queen’, told Their Majesties that he had been inspired by the 1970s.

In total, around 250 guests had been invited to the Elephant Family’s ‘Wonders of the Wild’ evening of ‘art and conservation’.

Charity chief executive Richard Hawkes told the crowd that Shand’s voyage across India on the back of an elephant had been a ‘crazy idea’ but one which had inspired the conservation initiative.

‘True to our founder, the guiding principle of Elephant Family has always been to raise awareness of wildlife conservation in the most joyful ways possible and tonight is testament to that.’

Communications expert Eva Omaghomi looked elegant as she posed for a photograph during Tuesday's soiree

Communications expert Eva Omaghomi looked elegant as she posed for a photograph during Tuesday’s soiree

French actor William Abadie (pictured) was on the guest list

The star, known for his role on Emily in Paris among others, sported a green paisley suit

French actor William Abadie, known for his role on Emily in Paris, sported a green paisley suit 

Actors Ed Westwick and Amy Jackson were among the more than 250 guests in attendance

Actors Ed Westwick and Amy Jackson were among the more than 250 guests in attendance

Westwick and Jackson are pictured smiling as they meet King Charles and Queen Camilla

Westwick and Jackson are pictured smiling as they meet King Charles and Queen Camilla

Sophie Ellis-Bextor performs at the 'evening of art and conservation' charity event held at Kew Gardens on Tuesday evening

Sophie Ellis-Bextor performs at the ‘evening of art and conservation’ charity event held at Kew Gardens on Tuesday evening

Some of the eggs from the Big Egg Hunt were placed outside the venue in Kew for the event on Tuesday

Some of the eggs from the Big Egg Hunt were placed outside the venue in Kew for the event on Tuesday

The King and Queen then took to the stage together to present two awards.

The Queen gave the Mark Shand Award to Dr Bibhuti Prasad Lahkar from the Indian-based organisation Aaranyak which works closely with Elephant Family.

Charles presented Rebecca Campbell with the Tara Award, named after the elephant on which Shand travelled around India. 

The King stayed on stage to give an off the cuff address.

Following Their Majesties departure, a live auction featured some of the eggs on display.

Also up for grabs were three nights at a safari resort in Nepal courtesy of Taj Hotels, a stay in the penthouse of Nobu London and a diamond elephant necklace, created by Chopard.

Guests saw a performance by singer Sophie Ellis-Bextor and a DJ set by Gok Wan.