Alexa Chung turned heads in a satin green gown at the star-studded Serpentine Gallery summer party in Kensington Gardens, London on Tuesday.

The model, 40, looked incredible as she went braless under the eye catching cut out backless number by Nensi Dojaka which showcased her amazing figure. 

Alexa added inches to her frame in a pair of stylish black stiletto heels and wore a glamorous palette of makeup. 

Styling her long dark tresses loose, the beauty flashed her gorgeous smile as she posed for sizzling snaps at the event. 

Alexa was joined during the glamorous evening by Maya Jama, Leigh-Anne Pinnock and Venus Williams who also dressed to impress. 

The outing comes after Alexa put on a leggy display as she headed to the Vogue World after party in Paris on Sunday. 

The star looked sensational in a gold embellished mini dress by CELINE by Hedi Slimane as she was joined by her rumoured fiancé Tom Sturridge, 38, at the star-studded event at Maxim's. 

The stylish ensemble boasted a round neckline, long sleeves, a gold diamante embellishment all over and an A-line skirt. 

She added inches to her supermodel frame with a pair of black strappy stiletto heels, while opting for natural hair and makeup. 

Alexa later took to her Instagram to share some late-night snaps with her followers.

In one snap, the TV presenter looked incredible as she struck a sultry pose in a dimly lit bathroom, before grabbing a late-night snack after all the festivities in another image. 

Alexa and Tom made a seriously stylish pair as they arrived at Vogue World: Paris at Place Vendome in the French capital earlier on Sunday evening.

The model looked stunning in a CELINE by Hedi Slimane champagne dress with a chic red rose design, which she styled with a pair of heels in the same shade.

She further accessorised with a pair of cream sheer gloves and drop earrings, while styling her brunette tresses in soft waves.

After recently sparking engagement rumours, Alexa wore a diamond ring over her glove, as she flashed the sparkler as she arrived at the event.

Meanwhile, her rumoured fiancé looked dashing in a white jacket, which he wore over a dark T-shirt with a pair of trousers and dress shoes.

The actor kept the look cool with a pair of Wayfarer sunglasses.

A cohort of famous faces is taking part in the sold-out Vogue World event, celebrating 100 years of fashion and sport in the iconic city.