Idris, 49, cut a dapper figure in a smart black suit while his wife of two years Sabrina, 32, looked sensational in a plunging sequin gown and actress Sienna, 39, turned heads in a pink suit complete with feather detailing.
Also attending the gala in support of the charity – which supports African mothers living with aids – were Pixie Lott, Emma Weymouth and Laura Jackson while Paloma Faith put on a show-stopping performance.
Pals: Idris Elba, 49, joined his wife Sabrina, 32, at charity mothers2mothers’ 20th anniversary bash in London on Wednesday, and the loved-up couple cosied up to pal Sienna Miller, 39
Other guests included: Jacqui Ainsley Ritchie, Caprice Bourret and her husband Ty Comfort, Andrea Rajacic, Jade Holland Cooper, Phoebe Vela Hitchcox, Sir Ozwald Boateng, Lady Orly Wolfson, Ivona Kirschel, Giorgio Veroni, Tamara Beckwith and Brigitta Spinocchia Freund.
Hit-maker Pixie, 30, showcased her taut midriff in a striking gown that boasted a jewelled bust and elegant white dress.
Meanwhile, the Marchioness of Bath, 35, slipped into a semi-sheer lace jumpsuit and added lace opera gloves for an extra dash of glamour.
Paloma, 40, turned heads in a show-stopping green dress layered beneath a striking leather harness that accentuated her physique.
Looking good: Sabrina looked sensational in a plunging sequin gown that also featured semi-sheer detailing
Dapper: Idris looked typically dapper at the bash (pictured with Emma Weymouth and Phoebe Vela Hitchcox)
Friendly display: The Elbas put on a friendly display with Martin Schwab and Carolina Schwab
Turning heads: Sienna turned heads in a pink suit complete with feather detailing and sported her signature shaggy-chic hairstyle
Standing tall: Sienna added height to her frame in chic open-toe heels and effortlessly worked her best angles for photographers
Bold: The actress made her look pop with a bold swipe of deep red lipstick (pictured with Laura Jackson)
It comes after Idris and Sabrina took to the stage during November’s COP26 Climate Change Summit in Glasgow during day seven of the event, which focused on ensuring the importance of nature and sustainable land use are part of global action on climate change and a clean, green recovery.
Sabrina is an International Fund for Agricultural Development ambassador while Idris is a UN Goodwill ambassador.
The event was the 26th Conference of the Parties and represented a gathering of all the countries signed on to the U.N. Framework Convention on Climate Change and the Paris Climate Agreement.
Striking: Hit-maker Pixie showcased her taut midriff in a striking gown while Emma wowed in black
Looking good: Pixie’s dress boasted a jewelled bust while Emma’s jumpsuit featured lace detailing
Show-stopping: Paloma Faith put on a show-stopping performance
In her element: The hit-maker was in her element while belting out songs and beamed from ear to ear
Unreal: Striking lighting had been used to create a night sky above Paloma during her set
Turning heads: Paloma turned heads in a show-stopping green dress layered beneath a striking leather harness that accentuated her physique
Strike a pose: Pixie, Sabrina and Emma worked their best angles for photographers
Group shot: Emma, Phoebe, Jade Holland Cooper, Sabrina, Paloma and Pixie cosied up for a group shot
Another one: Jade, Emma, Sir Ozwald Boateng, Sabrina and Phoebe got together for another group snap on the evening
Lovely: Emma and Phoebe looked lovely as they cuddled for photographers
Glamorous: Jade, Emma and Pixie were the epitome of glamour
All smiles: Emma and Sabrina wrapped their arms around each other and appeared to be having a blast
The aim of this year’s conference was to commit countries to net-zero carbon emissions by 2050.
Later that day, the Harder We Fall star took to Twitter to share a video produced by DEFRA (Department for Environment, Food and Rural Affairs), where children from around the world stressed the importance of protecting nature.
He wrote in his caption: ‘A lesson from our future generation.’
Huddle: Ivona Kirschel, Caprice Bourret and Lady Orly Wolfson huddled together for a photo
All yellow: Jacqui Ainsley Ritchie, Caprice and Andrea Rajacic also posed for snaps, with the former two women wowing in yellow
Loved-up display: Caprice and her husband Ty Comfort put on a loved-up display
Drinks in hand: Andrea and Jacqui posed with their glasses of bubbly in hand
Radiant: Tamara Beckwith looked radiant in a layered yellow dress while Angela Radcliffe wore a boho-inspired black gown
High spirits: Karen Gibson and the Kingdom Choir posed together and all seemed in high spirits
Centre of attention: It comes after Idris and Sabrina took to the stage during November’s COP26 Climate Change Summit in Glasgow