After welcoming their baby girl late last year, glowing new mum Sienna Miller and boyfriend Oli Green were spotted enjoying a beach day in Costa Rica last week as they took some time out from parenting their newborn.
In a lilac bikini, Sienna 42, looked gorgeous as she held Oli’s hand as they made their way to shore following a swim.
And now a source tells Closer how the iconic British actress – who has been dating Oli for two and a half years – is thriving and more loved-up than ever, so much so that there could be an engagement and another baby in the near future.
The insider says, “She and Oli are in a great place and having a child together has made them even stronger – with Sienna hinting that an engagement could well be on the cards this year.
“Sienna has also revealed how she’d love to have one more baby if her body ‘allows her’ after admitting she had been surprised to fall pregnant this time around.
“She’s feeling happier and more content than she has been in years and becoming a mum again has given her the happy ever after she’s been longing for.”
Sienna, who shares her 11-year-old daughter, Marlowe, with Tom Sturridge, from whom she split in 2020, first met model Oli, 27, when they were introduced by a mutual friend at a Halloween party in 2021.
She has since spoken about their 14-year age gap, admitting that at first she struggled to see a future with him.
Sienna told Vogue, “I was like, ‘This is absurd, this will not go anywhere.’ And then he worked hard to persuade me to go out for a drink with him.”
The actress – who has also dated Jude Law, Daniel Craig, Rhys Ifans and Jamie Dornan, and had a rumoured fling with Leonardo DiCaprio – has been engaged twice before – to Jude, who wed psychologist Phillipa Coan in 2019, and Tom, who is now dating Alexa Chung.
But the insider says that Sienna has fallen head-over-heels for Oli.
They add, “Sienna is on cloud nine right now and is loving every second of being in the ‘baby bubble’, which she is revelling in.
“Having another baby 11 years after Marlowe has made Sienna feel like a new mum all over again and, unlike friends who’ve had children close together, she’s been able to soak-up every moment with her baby like it’s the first time around. She feels far calmer and more relaxed.
“Having Marlowe, who is so doting and hands-on with her baby sister, as well as Oli who’s an incredible dad, has made it even better and she’s felt as if she’s been living ‘on a cloud’ for the last few months in their little love bubble as a family of four.”
Sienna, who shot to fame in the noughties, has also been open about freezing her eggs after celebrating her 40th birthday in 2022.
Of her decision, she has said, “The pressure about kids, and should I have more? And why haven’t I? All of that, which is a really loud noise.
“Biology is incredibly cruel on women in that decade – that’s the headline, or it certainly was for me.”
But after falling pregnant – a complete “surprise” for the couple – the source says Sienna won’t be feeling under any pressure to look or feel a certain way.
Speaking about her diet, Sienna, who does yoga three times a week, has said, “Cooking is a focus for me, but I wouldn’t say healthy… I’m more of a home cook: roasts, some Asian food, pastas and sauces and soups. In terms of, like, chia seed and whatever grains, no. I’m like, ‘Fried eggs and Marmite toast!’”
And the source says, “Becoming a mum again has given Sienna a new-found respect for her body and she’s loving the new curves having another baby has given her.
“She’s never been someone who’s struggled with her body image, and she’s also not fazed about getting her ‘pre-baby body’ back. She looks incredible and is not fussed about being a little wobblier in places – insisting she loves her body more than ever for making her another daughter.”