Poppy Delevingne puts on a leggy display in a super-high thigh-split black gown... as she steps out for the first time since husband James Cook was spotted on celebrity dating app Raya amid split rumours

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Poppy Delevingne stepped out for the first time since her husband James Cook was spotted on celebrity dating app Raya.

The model, 36, was attending a swanky Bulgari event at the Saatchi Gallery in London on Thursday night, putting on a leggy display in a super-high thigh-split black gown.

She looked in good spirits and ready to enjoy her night amongst the other celebs at the star-studded bash - despite her husband James appearing to move on from their relationship - as the pair are believed to have split.

Good spirits: Poppy Delevingne stepped out for the first time since her husband James Cook was spotted on celebrity dating app Raya, donning a black thigh-split gown

Poppy, 36, oozed sophistication in a revealing black thigh-split gown with a busty sweetheart neckline.

The model showed off her toned pins in the elegant look, teamed with strapped heels and a silver clutch bag.

She posed for a few snaps at the immersive experience, as did Suki Waterhouse, Sabrina Elba, Jessica Plumber and Zara Martin.

The socialite wore her blonde tresses in elegant curls and pinned them back to show off her photogenic facial features.

Moving on: Poppy's appearance comes after she and her 40-year-old entrepreneur husband James Cook are rumoured to have split - and he was spotted on celebrity dating app Raya

She wore a flawless face of makeup, with a pink sheen to her eyes and lips, and accessorised with a Bulgari necklace and stand-out diamond earrings.

Poppy's appearance comes after she and her 40-year-old entrepreneur husband are rumoured to have split.

They are said to have called time on their relationship at the beginning of the year but neither party has publicly addressed the rumours.

While the pair are said to have remained friends and still mix in the same social circles, it appears James is now moving on romantically. 

Blonde beauty: Poppy, 36, oozed sophistication in a revealing black thigh-split gown with a busty sweetheart neckline

Stunner: The model showed off her toned pins in the elegant look, teamed with strapped heels and a silver clutch bag

Alongside a series of brooding snaps on the dating app Raya, James describes himself as a CEO in the business and entrepreneur industry. 

One black and white image originally featured on his Instagram page with Poppy in the snap, yet he cropped her out for his dating profile. 

He had originally shared the picture on his social media in May last year alongside a birthday tribute to his wife. 

The image - which is the last photograph of Poppy on his Instagram feed - was captioned: 'Happy happy birthday my love can’t wait to celebrate with you when you get home. ❤️ @poppydelevingne.'

Posing it up! Inside the party, Poppy posed for fun snaps at the exhibition launch party with fellow guest Zara Martin

Ladies: Poppy posed for a snap with Zara Martin, Natalie Salmon and Olivia Buckingham at the star-studded event in London on Thursday night

Model: The socialite stunned in the all black ensemble, finishing off with a pair of black strappy heeled sandals (pictured with Bulgari creative director Lucia Silvestri)

MailOnline has contacted James and Poppy's representatives for comment.  

The Mail On Sunday reported in January that the pair had 'consciously uncoupled' after being little more than friends for the best part of a year. 

The following month she flashed her ringless hand to photographers at Perfect Magazine's London Fashion Week party at The Standard.

Poppy looked gorgeous on the night in a striking black and white gown, enjoying the celeb-packed bash with friends Georgia May Jagger and Iris Law.

Looking for love? Poppy Delevingne's husband James Cook has been spotted on celebrity dating app Raya following split rumours earlier this year 

However, there was no sign of her unique blue diamond engagement and wedding rings or James, whom she married in 2014 at a lavish Knightsbridge church ceremony, with sisters Cara and Chloe Delevingne among her 17 bridesmaids.

The same month, Poppy's husband James was posting from Chamonix, France, enjoying a ski trip with friends.

It's believed that Poppy moved into her own place in West London, with an insider spilling: 'James is refusing to accept things are over.'

Earlier this year, Poppy put on a very cosy display with Caspar von Bismark - whose brother was dating Kate Moss - as they attended the Teen Cancer America Art Auction in West Hollywood.

Throwback: One image on his dating profile originally featured on his Instagram page with Poppy in the snap, yet he cropped her out for his dating profile

They were spotted enjoying each other's company in April, as they posed for a snap with his arm wrapped around her.

James, who works for his family's aerospace company, proposed in October 2012 with a bespoke jewellery box by Anya Hindmarch. 

It contained an engagement ring alongside pictures of the couple and the words 'will you marry me?' embossed in gold.

Poppy went on to have three different elaborate hen parties around the globe with her celebrity friends including Rosie Huntingdon-Whiteley and Sienna Miller ahead of the lavish London nuptials.

The couple, who were together five years before they wed and do not have children, with Poppy musing back in 2017 about her family plans, saying: 'You know when you have a roast dinner? My favourite bit of a roast dinner is the potatoes and gravy.

'So what I do is I eat around them and save them till last, because that’s the best bit. And that’s kind of how I feel about having children.’

Despite the reported split, the pair have continued to mix in the same social circles, with the pair attending Glastonbury Festival together alongside pals Sienna Miller, Alexa Chung and Matt Smith in June.

Catch: Alongside a series of brooding snaps, James describes himself as a CEO in the business and entrepreneur industry