Sienna Miller is preparing for a beautiful new chapter after getting engaged to actor and model Oli Green.
The actress, 44, is set to marry Oli, 29, just weeks after welcoming their second child together — making it a whirlwind season of babies, diamonds and fresh beginnings for one of Britain’s most effortlessly cool stars.
Sienna first sparked engagement rumours when she was spotted in Barcelona wearing a sparkling diamond ring on her wedding finger.
And now the news has been confirmed: she and Oli are engaged.
For fans who have followed Sienna’s romantic life over the years, the moment feels especially sweet.
She has been engaged before, but has never married. This time, friends close to the couple say the relationship feels joyful, steady and full of laughter.
One source described Sienna and Oli as “ridiculously in love,” adding that they have built a lovely family together and genuinely enjoy each other’s company.
That may be the real magic of this relationship.
Not just glamour.
Not just red carpets.
But ease.
A shared home life.
Children.
Laughter.
And the kind of love that seems to have arrived when Sienna least expected it.
The couple began dating in 2022 and have since built a quietly serious relationship despite public fascination with their 15-year age gap.
Sienna has previously spoken with refreshing honesty about how she did not set out to date a younger man. In fact, she admitted that when she realised how young Oli was, she found it almost annoying — because the connection was already there.
But the relationship quickly became serious.
She has praised Oli’s emotional maturity, kindness and respect, suggesting that he brought something into her life that felt calm, grounded and different.
And now, with two children together, their bond has clearly deepened.
Sienna gave birth to their latest baby in May, though the couple have not publicly revealed the baby’s name or sex. She is also mother to daughter Marlowe, 13, whom she shares with ex-partner Tom Sturridge, while she and Oli welcomed their first child together in late 2023.
That means Sienna is now a mother of three — and judging by her recent comments, she is firmly in the beautiful chaos of newborn life.
During a recent appearance on The Tonight Show Starring Jimmy Fallon, she joked that stringing sentences together was difficult because she was on very little sleep.
But she also said she was “madly in love” with her baby.
It was the kind of comment every new parent understands.
Exhausted.
Overwhelmed.
Not entirely sure what day it is.
But completely besotted.
Sienna also opened up about travelling with a toddler and newborn, admitting that a transatlantic flight had pushed her to breaking point. She joked that while she might once have thought a teenage daughter would be the harder challenge, the toddler had now won “hands down.”
That honesty is part of Sienna’s charm.
She has never sold motherhood as polished perfection.
Even at her most glamorous, there is always a slightly undone, human quality to her — the feeling that she might be wearing a fabulous dress one minute and laughing about a disastrous airport experience the next.
That mix of elegance and realness is exactly why her fans have stayed so invested in her life.
Her engagement to Oli now feels like another piece of a larger reinvention.
In the past, Sienna’s love life often unfolded under intense scrutiny. Her relationships, heartbreaks and public dramas became tabloid fixtures, sometimes overshadowing her work and her identity as an actress.
But this chapter feels different.
Quieter.
More grown-up.
More private.
Oli has not tried to compete with her spotlight. Instead, he seems to fit into her world with ease.
He is an actor and model in his own right, with credits across television and fashion, but their relationship has never felt like a performance for attention.
When they appear together, they look relaxed.
When Sienna talks about him, she sounds amused, affectionate and surprised by how naturally it all happened.
That is why the engagement has landed so warmly.
It is not just a ring.
It is a sign that Sienna, after years of complicated romances and public curiosity, may have found the kind of partnership that feels simple in the best possible way.
The timing makes it even more emotional.
A new baby.
A growing family.
A diamond ring in Barcelona.
And a couple who, by all accounts, are deeply happy.
For Sienna, this could finally be the love story that makes it all the way down the aisle.
She has always had the bohemian beauty, the film-star cool and the ability to make even chaos look chic.
But now, at 44, she appears to have something even more valuable.
A settled family.
A partner who adores her.
And a future that feels full of possibility.
After welcoming their second child together, Sienna Miller and Oli Green are no longer just one of showbiz’s most stylish couples.
They are a family preparing for forever. 💍
