The blonde beauty was joined by an A-list line-up - including actor James Franco - at the BMW i3 event
Sienna Miller set the style bar high as she rocked pretty prints to join a star-studded line-up at the BMW i3 global bash in London last night.
PICS: SIENNA MILLER AND TOM STURRIDGE GET INTIMATE FOR BURBERRY CAMPAIGN
Fresh from an Italian getaway with boyfriend Tom Sturridge, the blonde beauty showed off a golden glow as she arrived for the big reveal, held at Old Billingsgate market.
Holding a masterclass in summer styling, Sienna chose a pretty, printed Dolce & Gabbana dress, teamed with delicate Charlotte Olympia heels, statement earrings and a pretty pink lip.
Love.
The actress was joined at the launch by Hollywood hot star James Franco, who sizzled in a Gucci suit, while Donna Air (sans James Middleton), Laura Bailey, Amber Le Bon and Poppy Delevingne were all in attendance.
Speaking at the launch, where she had the chance to try out the environmentally friendly new car, Sienna Miller said: 'Being a new mother I feel it's very important to make green choices and create a better world for the future.'
Jumping inside, she giggled: 'It's the perfect city car. Ooh double doors!'
Meanwhile James Franco said he could see himself driving one in Hollywood. 'Going green is now cool. I'm really excited about this, it's about time we started taking care of the environment. It's fantastic. I feel like it's the future,' he said.
'I'm happy to be involved with something that's green. That's cool. I like the orange one and I think it will cope with the Hollywood Hills just fine.'
We think so, too.
WATCH: Stars hit BMW launch...
What do you think of Sienna Miller's latest red carpet look? Let us know in the comments box below…
PICS: SIENNA MILLER AND TOM STURRIDGE GET INTIMATE FOR BURBERRY CAMPAIGN
THE CELEBRITY PARENTS WE'D HAPPILY LET ADOPT US
Got a tablet? You can now download Marie Claire magazine straight to your iPad, Kindle (just search the store for 'marie claire magazine'), Nook or Google Nexus.
-
We've Just Fallen In Love... With Sienna Miller's ShoesThe actress looked lovely at an event in London last night - but it was her glittery brogues that stole the show
-
Sienna Miller And Tom Sturridge Had A Loved-Up Oscars WeekendThe happy couple looked totally smitten with each other as they hit up the Oscars parties
-
Sienna Miller Opens Up About Her Hollywood Career, And How She Almost 'Sabotaged' ItSienna Miller says she nearly ruined her own Hollywood career, as she reflects on her bad girl behaviour...
-
Sienna Miller's Personal Voicemail To Daniel Craig Heard At Phone-Hacking TrialThe latest from the phone-hacking trial. Sienna Miller's personal phonecall to Daniel Craig is heard in court...
-
Robert Pattinson Returns To London... To Party In Notting Hill With Sienna MillerThe buff Twilight star has finally returned after months of living in LA, kicking off the party season with his pals Sienna and Tom...
-
Sienna Miller And Damian Lewis Lead Star-Studded Crowd At BFI Gala DinnerSienna Miller flew solo on the red carpet, while Homeland's Damian Lewis was joined by his wife, Helen McCrory. See ALL the stunning pictures
-
Sienna Miller Gets Political At Clinton Global Initiative In New YorkSienna Miller swapped the front row for the 'First Responders' as she announced a new commitment to assist communities in emergencies
-
Sienna Miller Styles Up For Night Out With Matthew WilliamsonSienna Miller left baby Marlowe at home for a night out with her designer pal. What did they get up to?
