The actress, 40, pulled her boyfriend, 25, into a warm hug as they hit the dance floor at The Eternity Charity Fundraiser presented by Lola Bute.
Sienna dazzled in a sequin-embellished floor-length dress with a backless design as they posed for some fun photos with a friend. Cara Delevingne29.
Glamorous: Sienna Miller, 40, snuggled up to model boyfriend Oli Green, 25, as she dazzled in a sequin-embellished dress at a star-studded charity party with Cara Delevingne, 29, in London
The dazzling number was completed with a tiered skirt and chiffon detailing on the shoulders.
Sienna carried a quilted Chanel bag with a gold chain strap and accessorized with a long chain necklace.
Her blonde locks were styled in a tousled bob as she added a radiant palette of makeup with a berry lipstick.
Loved: The actress pulled her boyfriend in for a warm hug as they hit the dance floor at The Eternity Charity Fundraiser presented by Lola Bute
Radiant: Sienna’s dazzling number was completed with a tiered skirt and chiffon detailing on the shoulders
Full of fun: The couple posed for some fun photos with their supermodel friend Cara
Oli, Sienna’s Burberry model, who bared his chest in an unbuttoned shirt and sleek black suit.
The loving couple looked adorable as they partied the night away surrounded by their famous friends.
The event was in support of various charities, including Action On Addiction, James’ Place, Place2Be and Grow at Alva Coachworks.
Also in attendance were Cara’s sister Poppy, Kate Moss, Ellie Goulding, Stella McCartney and Charlotte Tilbury.
Fundraising: The event was in support of various charities including Action On Addiction, James’ Place, Place2Be and Grow at Alva Coachworks
Dapper: Oli, Sienna’s Burberry model, who bared his chest in an unbuttoned shirt and sleek black suit.
Cute: Cara opted for a cream bandage dress with leather boots
Stunning: The night was hosted by Lola Bute, who wowed in a satin gown
Guests: Stella McCartney also appeared at the star-studded event.
Last month, Sienna broke her silence on her split from ex-fiancé Lucas Zwirner, 30, after she called off her plans to marry him last year.
Speaking frankly in an interview with dujour magazine, she said: ‘I obviously have a lot of experience becoming known at a time when the tabloids really had all the power and the individual had very little.
Anyone could write anything. It was a real frenzy. A peak of madness.
Split: Last month, Sienna broke her silence on her split with ex-fiancé Lucas Zwirner, 30, after she called off plans to marry him last year (pictured together in May 2019)
The Hollywood star split and got engaged to her third husband-to-be, Lucas, in January 2020 after just a year of dating; however, things soon went awry.
She continued: ‘I’ve dealt with some very public heartbreak. I was never someone who dreamed of getting married. I’ve been engaged several times, but I’ve never been married.
Showing her sense of humor, the BAFTA nominee joked: “I think it’s better than three divorces.”
Example: Sienna also dated actor Tom Sturridge from 2011 to 2015, and they got engaged in 2012. The couple share their eight-year-old daughter, Marlowe Ottoline Layng (pictured together in 2013).
Sienna dated her new man Oli in February at a New York Knicks game, seemingly confirming their romance.
The rising star has been modeling for much longer and was the face of a 2018 Burberry campaign and has also modeled for retailer GAP.
Sienna split from her ex-fiancé, Lucas, in September 2020 before she was spotted getting cozy with her old friend Archie Keswick last summer.
New man: Sienna dated her new man Oli in February at a New York Knicks game, seemingly confirming their romance (pictured in February)
Sienna famously dated actor Tom Sturridge from 2011 to 2015. The friendly exes are parents to nine-year-old daughter Marlowe.
Sienna was previously engaged to her Alfie co-star Jude Law on Christmas Day 2004, and they had an on-and-off relationship until they split for good in 2011.
The couple had taken issue with the revelation that Jude had an affair with their children’s nanny, Daisy Wright, in July 2005, and Sienna called off their engagement.
They later reconciled, but then in October 2005, Law learned that Sienna had an affair with his close friend, Daniel Craig.
Famous ex: Sienna was also engaged to her Alfie co-star Jude Law, who were in an on-and-off relationship until they split for good in 2011 (pictured in 2004)