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Sienna Miller has spoken candidly about her surprise pregnancies in her 40s, saying she 'wanted another baby for so long but didn't think it would happen'.

The actress, 44, welcomed her third child – a son – with her fiancé Oli Green in May. They also share a daughter who was born in early 2024.

Meanwhile Sienna also has 14-year-old daughter Marlowe with her ex Tom Sturridge.

Now in a new interview with Vogue she has opened up about motherhood and how she felt 'euphoric' about getting the chance to grow her brood.

She said: 'I'd wanted another baby for so long that my postpartum was just bliss. I had thought, by the time I was 40, that it wouldn't happen.

'That I'd have my one baby and I kind of made peace with it. It was such a surprise, and it was such a bonus that I was just euphoric. I felt existentially relieved.'

Sienna Miller has spoken candidly about her surprise pregnancies in her 40s, saying she 'wanted another baby for so long but didn't think it would happen'

The actress, 44, welcomed her third child – a son – with her fiancé Oli Green in May. They also share a daughter who was born in early 2024

She also spoke about finding first time motherhood a challenge after she had Marlowe as 'there wasn't as much focus on postpartum then'.

Sienna had an emergency C-section with her first daughter and has said she felt 'disappointed' and like she had 'failed' when she had a tough time postpartum.

When she welcomed her third child this May she planned and prepared for a natural birth, after two previous C-sections.

Sienna explained: 'I really wanted to have a natural labour with my third, which is kind of unheard of – especially after two C-sections. And I did it.'

She enlisted the help of Dr Gowri Motha and the Gentle Birth Method, a programme that 'blends self-hypnosis and visualisation with Ayurvedic teachings'

However despite the natural birth and subsequent postpartum care she received she still regrets going back to work so soon.

She appeared on The Tonight Show Starring Jimmy Fallon five weeks after giving birth and has now said: 'It was all too much. I thought I could manage it, but it was just complicated and hard.'

She announced she had welcomed her third child in May, simply saying: 'It's happened. I have a tiny baby next door.'

Sienna announced her third pregnancy by revealing her blossoming bump at the star-studded Fashion Awards in December.

Now in a new interview with Vogue she has opened up about motherhood and how she felt 'euphoric' about getting the chance to grow her brood (seen with partner Oli)

Meanwhile Sienna also has 14-year-old daughter Marlowe with her ex Tom Sturridge

In May, she said that she's surviving on 'very little sleep' as she opened up on returning to work just weeks after giving birth while appearing on The Tonight Show With Jimmy Fallon.

During her appearance on the show she opened up about the transition of having another child and spoke about her nightmare flight over to the US to promote new action movie Jack Ryan: Ghost War.

Sienna said: 'It feels like stringing sentences together is a bit challenging. I'm on very little sleep but I'm madly in love with my baby.

'It's crazy to be talking words and wearing a dress. What has happened from pajama gate.'

Asked by the host which of her children are tougher to look after, she said: 'I would have said the teenage girl would be harder to juggle until the transatlantic flight I took yesterday with the toddler and the newborn.

'The toddler now wins hands down. It was an absolute disaster. There's no negotiating. I got to the immigration line and just broke down.'