is finding being pregnant in her 40s 'so much easier' than her 20s.
The Layer Cake actress, 44, is expecting her third child, and she says being pregnant in her 40s is 'the best' because her life is in a 'more grounded space' now.
Sienna - who has a daughter, two, with current boyfriend Oli Green, 29, and daughter Marlowe, 13, with her ex - told Glamour: 'Having had a baby at 29, and then having a baby at 42, and now 44, it's so much easier...
'When you don't have the conflict of feeling scattered and like you want to be doing X, Y, Z. If I'm in bed at 9 p.m. with a book, I'm so happy now...
'And now I've got the excuse to do it. Life is in a more grounded space. I think the 30s are chaos. You're like, 'I want to settle down. I want kids.' '
Sienna Miller is finding being pregnant in her 40s 'so much easier' than her 20s (Sienna is pictured in December)
The Layer Cake actress, 44, is expecting her third child, and she says being pregnant in her 40s is 'the best' because her life is in a 'more grounded space' now (Sienna is pictured in 2012 while pregnant with daughter Marlowe, 13)
Sienna has also found being pregnant in her 40s easier because she doesn't care 'what anyone else thinks'.
She said: 'But by the time you hit 40, you're like, 'I kind of know who I am. I don't really give a s**t about what anyone else thinks. I'm a much more grounded human...
'We don't judge men who are having kids in their 80s. Why on earth is there any sort of narrative?'
The Alfie star previously froze eggs, but she 'didn't use them', and she counts herself as 'really fortunate' to be pregnant again naturally.
She added: I froze eggs. That was really revealing. I didn't use them. I was really fortunately able just to get pregnant, but it was an existential relief having done that in my late 30s.'
Earlier this month, Sienna admitted she was 'looking forward to taking some time off' as she prepared for the birth of her third child.
She told Grazia: 'I'm looking forward to taking some time off, being with my kids more consistently and surrendering to how random life is.
'That's something that I'm much more curious about as I get older - I have a much clearer understanding of how quickly life goes.
'I've always tried to fill my life with as much diversity as possible, and it's never been boring, so I'm excited to buckle up and continue whatever journey comes my way - the highs, the lows and everything in-between.'
Sienna They are still on good terms, with Sienna calling Tom her 'best friend' whilst they co-parent.
Last week, Sienna made a return to Instagram after eight years with a snap of her blossoming bump on Friday ahead of welcoming her and Oli's second child.
Sienna's breakthrough roles came 20 years ago in Layer Cake and Alfie but she somewhat
In summer 2024, just five months after giving birth, she stole the show during where she promoted her new movie - 's western epic, Horizon: An American Saga.
Sienna's performance in the film was one of its few critical high points, with many reviewers praising her compelling portrayal of Frances Kittredge amidst the film's mixed reception.
She was specifically noted for her 'impeccable American accent' in the role while Time magazine called Sienna 'far and away the best thing' about the project.
Last week, Sienna made a return to Instagram after eight years with a snap of her blossoming bump on Friday ahead of welcoming her and Oli's second child.
The actress already shares a daughter with model Oli, 29, (pictured) who they welcomed in January 2024, as well as 13-year-old Marlowe with ex-boyfriend Tom
In the beaming snap she held up her chunky knitted sweater to show off her bump which was shielded slightly beneath a T-shirt.
Sienna also donned a fluffy winter hat as she pulled a fun face for the camera alongside memes poking fun at her return to social media, following her last post in May 2017.
Alongside a snap of Michael Jordan's iconic 1995 two words fax as he came out of retirement was a meme of the late film director David Lynch refusing to any further on a previous statement.
Pals were delighted to see her back on the platform with Jennifer Aniston's ex, actor Justin Theroux, writing: 'omg the non-stop posting w you! It’s relentless'.
