Sienna Miller says she has wasted her thirties trying to tick off marriage and motherhood.

'I'd invested what felt like the important years in something that was just a bucket with a hole in it of a person. I wasted time. And I felt like time was really my currency,' the actor, now 40, told Vogue.

Recalling her thirties, she added: 'There was a lot of anxiety. Relationships hadn't worked out – I imagined that I would be married with three kids, being a great mum.'

While not married, the Anatomy of a Scandal star was previously engaged to her ex, actor Tom Sturridge, with whom she shares 10-year-old daughter Marlowe Ottoline Layng. The former couple dated from 2011-2015 and remain friends.

Miller may not have had the marriage and numerous children she once expected she'd have by 40, but gushed about motherhood. 'I love being a mother. It's what I do best,' she said.

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The star also shared a sweet detail about her daughter when discussing Sturridge's new relationship with presenter and fashion designer Alexa Chung - one she is, notably, 'really happy' about.

Addressing Sturridge's new relationship, she noted: 'It's genuinely lovely. Marlowe comes home with Alexa's jumpers that I steal. I've got one upstairs.'

Miller, who was also previously engaged to Jude Law in 2004, is currently dating 25-year-old model Oli Green.

In her interview with the same publication, Miller said of men her age: 'There's a misogyny that is ingrained in men of my age and older that I don't see in [the] generation below.

As for her new decade of life, she's 'excited'.

sienna miller mariage motherhood expectations 30s
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'As a young woman I was so trivialised and so insubstantial-seeming, but there's very little that anyone can say to a 40-year-old woman. And I also don't give a f**k,' she added.

'It was such a headline in my life – what people thought of me. It was so loud that I believed it. Now I've got to a point where it's absolutely none of your business.'

During her ELLE UK May cover interview earlier this year, Miller referred to 'the tranquillity of' her life right now.

She told us: 'There’s just much less anxiety, for no specific reason, other than maybe turning 40 and surrendering to being on some sort of life journey that is completely irrelevant.

'I think I know what matters to me: my friendships, my child and, ultimately, trying to be happy. That really is enough, with bursts of intensity and creativity. And, you know, way too much fun still at times, but I feel more in control of my life. And that’s really, really relieving.'

On the topic of love, she gushed: 'I feel pathologically optimistic about my ability to give and receive love.’

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Sakaynah Hunter

Sakaynah Hunter is the Digital News Editor at ELLE, covering subjects including politics, health, women’s interest, the royals and entertainment. Having worked in editorial roles across luxury e-commerce, newspaper and magazine journalism, she’s an all-rounder. When Sakaynah’s not at work, she loves psychological thrillers, the ballet and endless conversations over a glass of wine.