Sienna Miller looks effortlessly chic in a navy jumper and knee-high boots as she heads out for a stroll with fiancé Oli Green

Sienna Miller and her fiancé Oli Green enjoyed a low-key outing in Soho on Friday. 

The actress, 44, cut a stylish figure in a navy jumper, midi skirt and knee-high boots from Dune London. 

Sienna accessorised with sunglasses and a brown handbag, while model Oli, 29, looked casually cool in a khaki jacket. 

It was a rare outing for the couple, who took some time out of parenting duties to enjoy some quality time together. 

They welcomed their second child together in April, and got engaged two months later. The couple also welcomed a child in January 2024.

Sienna also shares a 14-year-old daughter, Marlowe, with actor Tom Sturridge, who she dated for four years until July 2015.

Sienna recently revealed that she was pregnant while filming the entirety of new divorce drama War and was 35 weeks by the end of shooting.

While she was pregnant with her third child she was filming War which she stars in opposite Dominic West. The series follows the ugly story of their divorce. 

Sienna plays Carla Duval while Dominic, 57, takes on the character of her ex Morgan Henderson in the legal drama which follows two elite London law firms going head-to-head for victory.

In a new interview, Sienna told how the shoot was tough due to her pregnancy and that it was long days of filming which saw her 'leaving and coming home in the dark'.

She starred alongside Phoebe Fox in War, who was also pregnant during shooting. Her pregnancy was written into the plot however. Sienna joked to the The Observer: 'She got in first. We sat together scoffing Freddos in between shots.'

It comes after earlier this month Sienna said that she feels like a 'lactating heifer' and is struggling to dress her 'massive boobs' after being 'pregnant or breastfeeding for nearly four years'.

In a candid interview, the mother-of-three joked that she was so tired that she 'doesn't know who she is' any more as she juggles work and raising her brood.

She said: 'I have completely lost my fashion sense. I've been pregnant or breastfeeding for nearly four years, and I think something happens to the brain – or you're so f***ing tired – that you sacrifice your identity. 

'You're just 'mother'... and not in the Gen-Z way, as much as I would like to be.'

'I'm just really questioning all this, because I'm just so underslept and I kind of don't know who I am. I also have massive boobs, which I don't know how to dress. Anyway, this is far too much information….' 

She also told Vogue that on the day of her interview with them she had been 'up breastfeeding since the crack of dawn', before adding: 'I just feel like a kind of lactating heifer.' 

Sienna also revealed that she often turns to model Alexa Chung – who is her ex Tom's partner – for fashion advice, including what to wear for the recent Oasis: Don't Look Back In Anger premiere.