Sienna Miller’s fiancé, Oli Green, is a British actor and model who has worked in television, film and fashion.

Green studied acting at the Lee Strasberg Theatre and Film Institute in New York, where he developed his performance skills before pursuing professional opportunities.

He has appeared in television productions including The Crowded Room, an Apple TV+ psychological thriller starring Tom Holland and Amanda Seyfried.

Alongside acting, Green has worked as a model and appeared in campaigns for fashion brands including Burberry.

His relationship with Miller brought him wider public recognition, although he had already established connections within the entertainment and fashion industries.

Green is younger than Miller, a difference the actress has discussed openly. She has explained that she initially had reservations about their age gap but eventually became comfortable with their relationship.

How Did Sienna Miller Meet Oli Green?

Sienna Miller and Oli Green first met at a Halloween party hosted by a mutual friend in 2021.

Their initial introduction developed into a romantic connection, and they began dating in early 2022.

The couple made their first major public appearance together at the Vanity Fair Oscar Party in March 2022.

Their appearance attracted attention because Miller had previously experienced several highly publicized relationships.

Unlike those earlier romances, her relationship with Green developed with relatively little public discussion about their private lives.

As their relationship progressed, they began attending film premieres, fashion events and other entertainment gatherings together.

Miller has spoken positively about Green’s personality and the emotional security she experiences in their relationship.

Their connection eventually developed into a family partnership, with the couple welcoming children together.

Sienna Miller and Oli Green’s Engagement

Sienna Miller and Oli Green became engaged in May 2026 after several years together.

Green reportedly proposed during a romantic outing in New York City’s Central Park.

The couple initially kept their engagement private before publicly confirming the news in June 2026.

Their engagement attracted considerable attention because Miller had previously been engaged to actors Jude Law and Tom Sturridge but had never married.

For fans who followed her earlier relationships, the announcement represented an important new chapter.

However, Miller and Green have not rushed into organizing a wedding.

In November 2026, the actress acknowledged that planning had been difficult because of their responsibilities as parents.

She joked about how poorly organized they had been and suggested that a ceremony in 2027 was their goal.

No confirmed wedding date or venue has been publicly announced.

How Many Children Does Sienna Miller Have?

Sienna Miller is a mother of three children, including two with Oli Green.

The couple welcomed their first child together, a daughter, in December 2023.

They subsequently welcomed a son in May 2026, expanding their family shortly before publicly announcing their engagement.

Miller also has an older daughter, Marlowe Ottoline Layng Sturridge, born in July 2012.

She shares Marlowe with her former fiancé, British actor Tom Sturridge.

The actress has discussed how motherhood has influenced her priorities and changed her approach to professional commitments.

Raising a teenager alongside two younger children has also shaped her daily routine.

Green has become part of this family environment, supporting Miller as they balance parenting with their acting careers.

Their responsibilities at home help explain why wedding arrangements have progressed more slowly than some fans expected.

Sienna Miller’s Previous Relationship With Tom Sturridge

Before meeting Oli Green, Sienna Miller was in a long-term relationship with actor Tom Sturridge.

The couple began dating in 2011 and became engaged the following year.

They welcomed their daughter Marlowe in 2012, establishing a family together during an important period in their careers.

However, Miller and Sturridge separated in 2015 without marrying.

Despite their breakup, they have maintained a cooperative relationship while raising their daughter.

Miller has spoken about the importance of preserving a positive family environment for Marlowe.

Their continued friendship has attracted attention because both have moved forward with their personal lives while remaining involved in parenting.

Green’s relationship with Miller has developed within this broader family arrangement.

Was Sienna Miller Married to Jude Law?

Sienna Miller was never married to Jude Law, although the two were previously engaged.

Their relationship began in 2004 after they worked together on the romantic comedy Alfie.

They became engaged on Christmas Day that year, attracting substantial attention from the British entertainment press.

However, their relationship experienced difficulties following revelations about Law’s infidelity.

The couple separated in 2006 before briefly reconciling in 2009.

Their renewed relationship eventually ended in 2011.

The romance remained one of Miller’s most widely discussed relationships because of the intense media attention surrounding both actors.

Since then, Miller has increasingly emphasized the importance of privacy and emotional stability in her personal life.

When Will Sienna Miller and Oli Green Get Married?

Sienna Miller and Oli Green are hoping to marry in 2027, although they have not confirmed a specific date.

Their plans remain flexible as they concentrate on raising their children and managing professional commitments.

Miller’s November 2026 comments suggest that the couple are enthusiastic about marriage but have not made organizing a ceremony their immediate priority.

For now, Green remains her fiancé, and there has been no public confirmation that they have secretly married.

Their relationship has developed from a chance meeting at a Halloween party into a partnership involving engagement, parenthood and shared family responsibilities.

For Miller, the relationship represents a different chapter from the romances that once dominated headlines. Rather than rushing toward a wedding, she and Green appear focused on enjoying the family life they have built together.