Sienna Miller, 42, stuns in a plunging silk gown as she joins boyfriend Oli Green, 27, at billionaire friend David Winter’s Venice wedding – five months after welcoming their baby daughter

Sienna Miller looked sensational as she and boyfriend Oli Green attended billionaire pal David Winter’s wedding to Georgia Irwin in Venice on Saturday.

The actress, 42, welcomed her second child – and first with Oli – in January, a baby girl whose name they have not revealed, went braless beneath a plunging burnt orange gown for the occasion.

Sienna’s silk dress hugged her gorgeous curves and she completed the look with a chunky gold choker and matching bracelet.

The stunner, who already shares 11-year-old daughter Marlowe with ex-partner Tom Sturridge, added extra height to her frame with a pair of strappy sandals and toted her essentials for the day in a chic clutch. 

Meanwhile Oli, 27, cut a dapper figure in a dark tailored suit which he layered over a crisp white shirt and emerald green tie. 

The actress, welcomed her second child – and first with Oli – in January , a baby girl whose name they have not revealed, went braless beneath a plunging burnt orange gown for the occasion 

Sienna’s silk dress hugged her gorgeous curves and she completed the look with a chunky gold choker and matching bracelet

Standard Industries CEO David’s wedding was held on the nearby La Certosa Island with guests, and their cocktails, taken to the swanky venue via water taxi. 

La Certosa is an island in the Venetian Lagoon and located 500 meters northeast of Venice.

Following the star-studded ceremony Sienna and Oli were spotted strolling through the sunshine hand-in-hand. 

Other guests included Prince Harry’s ex Cressida Bonas, 35, who put on a very leggy display in a sparkly brown dress with very racy split.  

Just five months after having a baby, Sienna stole the show on the red carpet in Cannes last week as she promoted her new movie – Kevin Costner‘s western epic, Horizon: An American Saga.

Her co-star summed her up by saying: ‘Her outward beauty is undeniable, but she’s so skilled as an actress.’ 

Embracing being a mother again in her early forties, Sienna is undergoing a renaissance with fans and commentators declaring that the British actress has ‘never looked better’ despite the demands of work and having a young family.

Brand and Culture Expert Nick Ede told MailOnline that he predicts that Sienna could be about to ‘steal the crown to become the UKs biggest Hollywood star’. 

The stunner, who already shares 11-year-old daughter Marlowe with ex-partner Tom Sturridge, added extra height to her frame with a pair of strappy sandals 

She toted her essentials in a chic pink clutch  

She let her blonde locks fall in a gentle wave and completed the look with a classic red lip 

Sienna carried her flowing gown as she made her way to the wedding 

Meanwhile Oli cut a dapper figure in a dark tailored suit which he layered over a crisp white shirt and emerald green tie

The couple appeared in great spirits as they celebrated their pal’s big day 

Standard Industries CEO David’s wedding was held on the nearby La Certosa Island with guests, and their cocktails, taken to the swanky venue via water taxi

Sienna was helped into the boat by another guest who also kissed her on the hand

Sienna and Oli were seen following the ceremony strolling together hand-in-hand through the sunshine

La Certosa is an island in the Venetian Lagoon and located 500 meters northeast of Venice

The couple enjoyed refreshing cocktails in the sunshine 

Happy couple David Winter and Georgia Irwin pictured in 2022 

He said: ‘Sienna’s been looking after herself and got herself red carpet ready knowing this is going to be her big return to the big screen and knowing all eyes will be on her. She’s done everything right and she commands The Croisette’ – the beating heart of Cannes.

Sienna’s breakthrough roles came 20 years ago in Layer Cake and Alfie – but despite winning plaudits for American Sniper her acting career hasn’t consistently hit the same heights.

But the she is back in the big time  despite the demands of a red carpet promotional campaign in the south of France this week, Sienna has also brought her newborn baby and 11-year-daughter with her. 

 Sienna looks to have barely aged a day since breakthrough year of 2004. She has put her health and fitness down to regular yoga and a love of protein-rich fried eggs and vitamin-laden Marmite – ignoring trends like ‘chia seed and whatever grains’, Sienna said recently. 

Other guests included Prince Harry’s ex Cressida Bonas, 35

The blonde beauty put on a very leggy display in a sparkly brown dress with racy split 

Cressida wore her blonde tresses loose as tumbled past her shoulders  

She was helped on board her water taxi by waiting stafff 

But she has confessed to ‘cheating’ by using a little fake tan to make her skin glow, her youthful appearance is down to regular facials starting at £400 for 90 minutes and her famous champagne blonde hair highlights will cost at least £500.

Experts are predicting that 2024 is the year she is stepping out of the shadows having been eclipsed for years by boyfriends such as Jude Law and Orlando Bloom as well as rumoured lovers Leonardo DiCaprio, Daniel Craig and Brad Pitt.

More Hollywood roles in her forties and a run on Broadway in New York, where she lives with her family, is also being predicted.

Nick Ede said that years of being ‘bypassed’ by directors for actresses on shows like The Crown and Downton Abbey may be over.

He said: ‘She has always been someone that has perhaps been more associated with her partners than her work but for once and for all she’s back and stealing the crown to become the UKs biggest Hollywood star. 

Just five months after having a baby, Sienna stole the show on the red carpet in Cannes last week as she promoted her new movie – Kevin Costner ‘s western epic, Horizon: An American Saga 

Sienna Miller was supported by family and was joined by Oli and daughter Marlowe, 11,  at the premiere of her film Horizon: An American Saga premiere in Cannes 

‘Ms Millar is back at the top of her game and wowing the crowds in Cannes with her stylist clothes, fabulous looks and wonderful acting in the new Kevin Costner movie Horizon.

‘Sienna has always been a brilliant actress but it feels that for a while she was being bypassed by UK stars who appeared in The Crown and people were not considering Sienna as one of our best actresses.

‘With this new movie and her post baby glow she has the world at her feet and with the great reviews she’s receiving I think she will be up for awards and be offered some meaty starring roles in the next few years.

‘I can see her getting some big brand endorsements too and she’s always loved treading the boards so I wouldn’t be surprised if she decided to do a play on Broadway for a limited run to build her fanbase and her acting resume just gets better and better’.