Sienna Miller and Oli Green looked every inch the stylish couple as they made their way home following the star-studded European premiere of Swiped at the Curzon Mayfair in London on Thursday evening.

The American-British actress, 43, nailed smart-casual chic in a baby blue button-up shirt and a dark brown bomber jacket. 

She teamed the look with black high-waisted flared jeans and added height with a pair of black leather boots. 

To complete her ensemble, Sienna carried an oversized black textured shoulder bag and accessorised with a cluster of delicate earrings. 

Meanwhile, her boyfriend Oli, 28 - who is 15 years her junior - cut a more laid-back figure in a blue denim shirt layered over a plain white T-shirt. 

He finished his outfit with light-wash denim jeans and brown suede shoes, beaming beside Sienna as they headed to their car. 

Earlier in the evening, the actress appeared in high spirits as she posed up a storm on the red carpet ahead of the screening. 

The upcoming drama movie follows Whitney Wolfe Herd (Lily James) as she breaks into the male-dominated tech industry by launching two innovative dating apps, making her the world's youngest self-made female billionaire. 

Sienna previously dated Tom Sturridge, 39, for four years and split in 2015. They are still on good terms, with Sienna calling Tom her 'best friend' whilst they co-parent their daughter, Marlowe, 12.

Sienna has given her seal of approval for her ex and his fiancee Alexa Chung, and in December told Vogue UK: 'I'm really happy for them. It's genuinely lovely.'

The actress even joked about their co-parenting situation and revealed that their daughter Marlowe, has brought one of Alexa's jumpers home, which she has since claimed for herself. Sienna quipped: 'I've got one upstairs!'

Following their split in 2015, it was claimed that Sienna and Tom had different goals. A source said: 'Tom wanted to get married and have more children. Sienna didn't.

Sienna welcomed her first child with Oli last year after they started dating in 2022.

Speaking previously to Harper's Bazaar about Oli, Sienna said: 'I didn't expect to take it seriously and then quite quickly, I fell in love. I wasn't like, "I'm gonna get a younger boyfriend." It was more, "F*ck! Why are you young? That's so annoying." 

'There is a difference in the way that generation of men respect women. It's specific to him, he is very wise and well-adjusted, but I do believe it's also that generation.

'They have grown up with a slightly more level playing field. I see it in his female friends as well as in the men.'