Sienna Miller, 42, wows in a silk gown at David Winter’s Venice wedding alongside boyfriend Oli Green, 27, just months after giving birth to their 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, who welcomed her first child, a daughter, with the male model in January, 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.

She 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. 

Sienna Miller, 42, looked nothing short of sensational as she and boyfriend Oli Green, 27, attended billionaire pal David Winter’s wedding in Venice on Saturday

The actress, who welcomed her first child with the male model in January, 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’. 

She added extra height to her frame with a pair of strappy sandals and toted her essentials for the day in a chic clutch

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

Sienna carried her flowing skirt as she made her way to the ceremony 

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

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