Sienna Miller Husband: Is She Married to Oli Green and Who Are Her Three Children?

Sienna Miller has spent much of her adult life in the public eye, so it is hardly surprising that her relationships have generated nearly as much curiosity as her acting career. Yet despite several serious romances and previous engagements, the British-American actress has never been legally married. That may soon change.

Sienna Miller is engaged to actor and model Oli Green, her longtime partner and the father of two of her three children. Their engagement was confirmed in June 2026, several weeks after the couple welcomed their second child together. Miller also has an older daughter, Marlowe, from her previous relationship with actor Tom Sturridge. With three children and a wedding potentially ahead, her personal life has entered another meaningful chapter.

Is Sienna Miller Married?

Sienna Miller is not currently married.

She is engaged to Oli Green, an actor and model whom she began dating several years ago. Their engagement became public in June 2026.

For Miller, the engagement is interesting because she has previously spoken openly about not feeling that marriage was essential to a committed relationship.

She has also had two significant engagements in the past without eventually marrying either partner.

Her relationship with Green, however, has continued to evolve. They have built a family together, welcomed two children and now appear to be preparing for marriage.

The couple have not made every detail of their wedding plans public, so exactly when they will marry remains private.

Who Is Oli Green?

Oli Green is an actor and model who has developed a career of his own while keeping a relatively low profile compared with Miller.

Their relationship first attracted attention in early 2022, although the pair had reportedly met at a Halloween party in late 2021.

What started quietly soon became a serious partnership.

They began appearing together publicly and eventually made their relationship red carpet official.

The age difference between Miller and Green initially attracted some outside attention, but Miller has spoken about their relationship in a way that suggests the gap mattered much less inside their actual partnership than it did to observers.

Rather than rushing toward marriage, they allowed the relationship to develop over several years.

During that time, they also became parents together.

How Did Sienna Miller and Oli Green Meet?

Miller and Green reportedly crossed paths at a Halloween party in 2021.

Their connection developed afterward, and dating reports began circulating as they were increasingly seen together.

By early 2022, they were comfortable enough to make public appearances as a couple.

Their relationship arrived during a period when Miller had already experienced years of highly publicized romances.

That history perhaps explains why she appeared comfortable taking a quieter approach with Green.

Instead of building their relationship through constant social media updates or interviews, they largely kept everyday details to themselves.

Over time, however, major milestones naturally became public.

One of the biggest came when Miller became pregnant with their first child together.

Sienna and Oli Welcomed Their First Daughter

In August 2023, Miller was photographed while pregnant during a trip to Ibiza, confirming that she and Green were expecting a baby.

The pregnancy became a particularly meaningful moment for Miller.

She had previously spoken about the pressure she felt surrounding motherhood and the possibility of having another child after turning 40.

Miller had already experienced motherhood through Marlowe, but she had discussed questions surrounding whether she wanted to expand her family.

By that stage of her life, she had reached a more relaxed perspective, feeling that if another pregnancy happened, she would welcome it.

Her relationship with Green ultimately brought that new chapter.

Their daughter was born in December 2023, with news of the arrival becoming public in early January 2024 after Miller was photographed with her newborn.

The couple have kept their daughter’s name largely outside the public conversation.

Their Second Child Arrived in 2026

Miller’s family expanded again a little more than two years later.

In December 2025, she appeared at the Fashion Awards in London with a visible baby bump, revealing that she and Green were expecting their second child together.

The pregnancy made Miller a mother of three.

Their baby, a son, arrived in late April 2026.

Miller confirmed the arrival publicly the following month while discussing the reality of life with a newborn.

Rather than presenting early motherhood as effortless, she spoke about getting very little sleep and finding even simple things such as putting sentences together more difficult.

At the same time, she made it clear that she was deeply in love with her new baby.

The arrival gave Miller and Green two children together, while Marlowe remained Miller’s oldest child from her earlier relationship.

Sienna Miller Is a Mother of Three

Sienna Miller has three children in total.

Her oldest daughter, Marlowe, was born in July 2012 during Miller’s relationship with actor Tom Sturridge.

More than a decade later, Miller welcomed her second daughter with Oli Green in December 2023.

Her third child and second with Green arrived in spring 2026.

Miller has generally been protective of her children’s privacy, particularly when they are young.

Marlowe has occasionally accompanied her mother to public events as she has grown older.

In February 2023, mother and daughter attended a fashion show together in New York. Marlowe later joined Miller and Green at the Cannes Film Festival in May 2024 for the premiere of Horizon: An American Saga.

Those appearances have remained occasional rather than becoming a constant part of Miller’s public image.

Sienna Shares Marlowe With Tom Sturridge

Before her relationship with Oli Green, one of Miller’s most significant partnerships was with Tom Sturridge.

Miller and Sturridge began dating around 2011.

In 2012, they welcomed Marlowe.

The couple became engaged but never married.

Their relationship ended in 2015 after approximately four years together.

The end of their romance did not end their connection as parents.

Marlowe remained the priority, and Miller has spoken candidly over the years about both the joy and exhaustion that can come with motherhood.

She has described the parent-child relationship as incredibly intense and loving, while also acknowledging the guilt and pressure mothers can place on themselves.

Her comments have often been less about presenting an idealized picture and more about recognizing how complicated parenting can actually feel.

Was Sienna Miller Engaged to Jude Law?

Long before Oli Green and Tom Sturridge, Miller had another highly publicized relationship with Jude Law.

The two became one of Britain’s most closely followed celebrity couples during the 2000s.

They began dating after working together on the film Alfie and became engaged in 2004.

Their relationship attracted enormous tabloid attention and eventually went through a difficult period before the engagement ended.

Miller and Law separated in 2006.

They later rekindled their relationship for a period, but the reconciliation did not ultimately lead to marriage.

Despite being engaged, Miller never became Jude Law’s wife.

That distinction is important because searches for Sienna Miller’s husband sometimes create confusion around her previous engagements.

Why Sienna Miller Never Rushed Into Marriage

Miller’s romantic history shows that she has never treated a wedding as the only proof that a relationship is serious.

She has previously discussed marriage and prenuptial agreements while expressing a preference for the substance of a committed partnership rather than focusing only on its legal status.

Her life also reflects that view.

She built a family with Tom Sturridge without marrying him and later developed another committed partnership with Green before their engagement.

By the time Green proposed, the couple had already experienced several major life changes together.

They had been together for years and had welcomed two children.

Their engagement therefore appears less like the beginning of a serious commitment and more like another step in a relationship that was already firmly established.

Sienna Miller and Oli Green Are Now Engaged

By June 2026, Miller and Green were ready for the next stage.

Their engagement was confirmed shortly after the arrival of their second child together.

For Miller, it marks her third known engagement but potentially the first that will lead to marriage.

The couple have not turned their engagement into a heavily publicized wedding countdown.

That fits the way they have managed much of their relationship.

They attend events together and acknowledge important milestones, but they have generally kept the more personal details within their family.

Whether that changes when their wedding approaches remains to be seen.

Sienna Miller’s Family Life Today

Sienna Miller’s personal life today looks considerably different from the period when her relationships regularly dominated celebrity headlines.

She is now a mother of three, raising Marlowe alongside her two younger children with Green.

Her oldest daughter has gradually become more comfortable appearing alongside her at selected public events, while the younger children remain largely protected from the spotlight.

Green has also become a central part of this family structure.

Their relationship has moved from a quiet romance that began after a Halloween party to parenthood, a growing household and an engagement.

For anyone searching for Sienna Miller’s husband, the important detail is that she does not currently have one. Oli Green is her fiancé, and the couple are planning a future together after welcoming two children.

Miller’s earlier engagements to Jude Law and Tom Sturridge never resulted in marriage. Her relationship with Green has taken a different path so far, developing gradually before reaching an engagement after they had already built a family.

Whether Miller soon officially becomes a wife remains another chapter still to come. For now, Oli Green is the man she is engaged to, her longtime partner and the father of her two youngest children.