Sienna Miller, 42, looks effortlessly stylish with boyfriend Oli Green, 27, at Carolina Herrera X Frame party in New York City

Sienna Miller looked effortlessly stylish as she attended the Carolina Herrera X Frame party in New York City on Thursday.

The actress, 42, was joined by her boyfriend Oli Green, 27, for the celebration which was held at Chez Margaux.

She wore a casual ocher yellow denim combination, consisting of an oversized jacket and matching wide-leg jeans.

Sienna paired her outfit with a plain T-shirt, a pair of Calvin Klein boxers and a gray Prada handbag.

Oli opted for a similar look by pairing a suede jacket with black jeans and a white T-shirt.

The actress and actor welcomed their first child together earlier this year after they started dating in 2022.

The actress, 42, was joined by her boyfriend Oli Green, 27, for the party which was held at Chez Margaux

The actress gave birth to her daughter Marlowe, now 12, with her ex Tom Sturridge in July 2012.

And after welcoming her second child into the world with Oli earlier this year at the age of 42, Sienna shared Stellar magazine that she couldn’t recommend late motherhood more highly.

The American Sniper star welcomed their daughter, whose name she has not revealed, in January.

“My own experience of motherhood, 12 years later, is completely different,” the British star told the publication.

‘I’m a completely different person. People often have a lot to say about women having babies as women, but I can’t advocate it more. I feel very happy.’

Last month, Jude Law revealed he has ‘moved on’ since the time in his life when he was engaged to Sienna, as he posed for a soft new shoot with VARIETY.

The actor, 51, told the publication ‘that time in his life is over now’ after his relationship was the center of huge public attention.

She wore a casual ocher yellow denim combination consisting of an oversized jacket and matching wide leg jeans (pictured with Erik Torstensson)

Oli opted for a similar look, pairing a suede jacket with black jeans and a white T-shirt (pictured with Wes Gordon, right)

Jude and Sienna split in 2006 after his affair with his children’s nanny, Daisy Wright, became public in 2005, and the actress said in 2020 that she found the scandal “very difficult.”

Speaking about his and Sienna’s time when he and Sienna were engaged, Jude said: ‘That time is over now and I’ve moved on from it. And luckily the attention of the photographers and the curious eyes are also focused on me.

‘But I have had to learn to live in such a way that they stay at a distance. And I must treat the privacy of my children and my partner in the same way.’

Sienna and Jude first met on the set of their film Alfie, and the pair got engaged on Christmas Day in 2004 after almost a year of dating.

She broke off the engagement following news of his affair, with the couple splitting in November 2006 after failing to save their relationship.

They reconnected in late 2009 when they both starred on Broadway, with Sienna even spending Christmas with Jude and three of his children in Barbados, but they split again in February 2011.

Amelia Gray Hamlin put on a quirky show in a crop top and red miniskirt

She was joined at the event by her sister Delilah Belle

Delilah wore a denim trench coat with fur trim

The siblings posed for some fun snaps at the event

Micaela Diamond wore a blue turtleneck top and an A-line denim skirt

Last month, Jude Law revealed he has ‘moved on’ since the time in his life when he was engaged to Sienna, as he posed for a soft new shoot with VARIETY (pictured in 2004)

Before meeting Sienna, Jude was married to Sadie Frost – with whom he shares three of his children, son Rafferty, 24, Iris, 20, and Rudy, 18 – but they divorced in 2003, after six years of marriage.

Jude is now married to psychologist Phillipa Coan, 32, who he was first spotted with at the Hay literary festival in 2015.

The couple tied the knot at London’s Old Marylebone Town Hall in 2019, before partying in Mayfair – three months after the actor announced their engagement. They have two children together.

The actor also has daughter Sophia, 15, with model Samantha Burke and Ada, nine, with musician Catherine Harding.