Ellie Goulding, Sienna Miller and Lily Allen attend Chiltern Firehouse

Ellie Goulding put on a very racy display as she joined Sienna Miller and Lily Allen at the Chiltern Firehouse 10th anniversary party.

The English singer-songwriter, 37, was among those in attendance at the star-studded costume bash in London on Thursday. 

Ellie showed off her ample cleavage in a daring linger-inspired ensemble, consisting of a black sheer corset bodysuit with a striped skirt attached.

She paired the look with a Venezian-style mask and a pair of platform heels, with her blonde locks left down in natural waves.

Meanwhile Smile singer Lily, 39, donned an equally daring outfit as she arrived in a see-through white lace strapless gown, complete with a boned corset, floral appliques and a silver belt. 

Lily finished off her look with a pair of silver stilettos and carried a clutch bag to match her gown, sweeping her red locks into an updo. 

Actress Sienna, 42, was another star in attendance who opted for a sheer look exposing her underwear.

Sienna looked chic in a see-through black transparent kimono-style gown, which had a gold sequined bra design. 

Visible under the dress was a pair of thigh-high leather boots and black briefs, as the star carried leather bag with a gold ring handle and covered her eyes with a sequin mask.

Idris Elba's wife Sabrina also stepped out for the evening, in a far more conservative ensemble. 

The Canadian model, 35, looked effortlessly chic in navy belted blazer dress with sheet tights and stilettos. 

Sabrina looked giddy as she posed alongside hunky firemen at the event on Thursday. 

Heartstopper's Yasmine Finny exuded style as she arrived a high-necked navy coat complete with a black belt, with a tiny black skirt peaking out of the bottom. 

She completed the look with brown leather boots and a pair of grey socks, with a brown leather bag over her shoulder. 

The evening also saw a royal arrival, as Princess Beatrice made her way into the event. 

Beatrice kept it simple in a pair of black tailored trousers with a velvet belted blazer and open-toed heels. 

Rachel Weisz made a discreet arrival as she covered up her look in a long black trench coat.

The actress, 54, carried a small clutch bag and sported a pair of stilettos, with her chocolate brown locks styled straight.

Model and socialite Lady Victoria Hervey, 47, inkept with the sheer theme as she stepped out in a see through lace bodysuit complete with feather wrist cuffs.

She paired the bodysuit with velvet flared trousers and a quilted leather bag, finishing off the look with a chic mask. 

Socialite Emma Thynn, Marchioness of Bath, showed off her incredible figure in a white sequined dress.

The figure-hugging gown was completed with a lace bra bodice and wore a mesh hair piece over her face. 

In comparison, Camilla Cabello also kept it conservative in a black midi dress with a huge black coat over the top.

Other stars in attendance at the lavish party were Oasis's Noel Gallagher, Idris Elba and former Vogue editor Edward Enninful.