If you’ve been scrolling through celebrity news feeds or admiring the red-carpet fashion from the recent awards season, you’ve almost certainly seen Sienna Miller glowing in the spotlight. Because the 44-year-old actress and style icon has always had her personal life heavily scrutinized by the press—from her high-profile 2000s romances to her modern-day blended family—it’s completely understandable why fans are so invested in her current relationship status. Whenever she steps out looking incredibly happy, a familiar question instantly starts trending: Who is Sienna Miller’s boyfriend in 2026, and are they still together? But before you start digging through old tabloid rumors or wondering if the iconic boho-chic star has secretly moved on to a new leading man, let’s set the record straight and dive into the joyful reality of her current personal life.
The Truth About Her Relationship: Are They Still Together?
Let’s get right to the point: As of early 2026, Sienna Miller is still happily dating her long-term boyfriend, actor and model Oli Green, and the couple recently announced they are expecting their second child together. It’s incredibly easy to see why some fans might lose track of the timeline. In the fast-paced world of Hollywood, celebrity relationships are often fleeting, and the media loves to manufacture drama where there is none. Because Miller and Green have a noticeable 15-year age gap, the internet is frequently buzzing with unwarranted speculation about their longevity. It’s totally normal to see a few cryptic comments on social media and wonder if you missed a major breakup announcement! However, the current chatter about them parting ways is completely unfounded. The couple has been going strong since they were first linked in late 2021, and they are currently more committed than ever.
Who is Oli Green? The Man Beside the Actress
To understand why their relationship has thrived despite the intense glare of the public eye, we have to look at who Oli Green actually is. While Miller is the established A-lister, the 29-year-old Green is a highly successful professional in his own right. He has carved out a solid career as a rising actor and high-fashion model, working with major brands and seamlessly navigating the entertainment industry alongside his partner.
Rather than shying away from the conversations about their 15-year age difference, Miller has tackled them head-on with incredible candor. In a highly publicized March 2026 interview with Grazia magazine, she directly addressed the societal double standards surrounding their romance. She pointed out that while older men dating younger women has always been accepted in Hollywood, an older woman with a younger man is “still fetishized rather than normalized.” She noted a distinct disparity that she wants to see disappear, praising Green’s generation of men for their deep respect for women, clear boundaries, and healthy self-assurance.
The Massive 2026 Update: Preparing for Baby Number Three!
So, if they aren’t busy navigating imaginary breakups, what is the couple up to these days?
They are officially stepping into an incredibly busy and exciting chapter. In December 2025, Miller broke the internet by debuting a beautiful baby bump at the Fashion Awards at the Royal Albert Hall in London, wearing a stunning, sheer white Givenchy gown. This confirmed that she and Green are expecting their second child together.
This new arrival will be Miller’s third child overall. She shares a 13-year-old daughter, Marlowe, with her ex-fiancé Tom Sturridge, and she welcomed her first daughter with Green in late 2023. Miller has been incredibly open about the unglamorous, everyday realities of her current pregnancy, recently sharing that she is currently craving vinegary foods and bracing herself for the inevitable postpartum hair loss. Her willingness to be transparent about these relatable struggles has resonated deeply with mothers everywhere, proving she is far removed from the pristine, untouchable celebrity image.
Embracing the Chaos and Taking a Step Back
Another reason fans are so fiercely supportive of Miller’s current happiness is because they’ve watched her endure the absolute worst of the invasive tabloid culture in the past. Today, she is actively redefining her boundaries and prioritizing her peace.
Having previously spoken about the “cruel” biological realities women face in their thirties and her decision to freeze her eggs at age 40 to alleviate that existential pressure, Miller is now fully embracing the beautiful chaos of a large, blended family. She recently announced that she is looking forward to taking significant time off from acting in 2026 to be with her kids more consistently. Instead of chasing the next blockbuster role, she is happily surrendering to the unpredictability of raising a newborn alongside a toddler and a teenager.
The Bottom Line
While the internet loves to spin wild rumors and debate the dynamics of celebrity age gaps, the reality of Sienna Miller’s life in 2026 is grounded, peaceful, and full of joy. The speculation about a breakup is entirely false, and her fans have plenty to celebrate as they watch her step boldly into this beautiful new era of motherhood with Oli Green firmly by her side.