‘Grounds for Divorce’? Inside Justin and Hailey Bieber’s Contrasting Fashion

Here’s Everything You Need to Know About the Man Who’s Captured Miller’s Heart.

Oli Green Is an Actor

Born in 1997 to Jonathan Green and Alison Ross Green, Oli Has Strong Links to the Art World Through His Parents, According to British Media. His Father Is the Son of an Art Dealer and Gallerist, While His Mum Has Worked at Sotheby’s in New York and Serpentine Galleries, and Is Now a Vip Adviser at Frieze Masters, per Her Linkedin.

Simon Cowell Sold His London Mansion After Living in ‘Constant Fear’ There

It’s Unclear Whether Green Is Still Pursuing a Modelling Career, but During His Earlier Days, He Worked on Campaigns for Burberry, Urban Outfitters and Gap, per Grazia.

He’s Worked with Plenty of a-Listers

Despite Having Just Five Acting Credits to His Name, Green Has Already Had Multiple Opportunities to Work with a-List Stars.

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Although Green Is Now Romantically Linked to a High-Profile Celeb, He Has Kept His Private Life Under Wraps. Not Much Is Known About Him Besides the Productions That He’s Been In. His Instagram Is Limited to His Work Promotions, Though His Video Selfies Seem to Show His Playful and Nonchalant Personality.

He’s Set to Star in the Crown Season Six

Green Is Adding Another Impressive Gig to His Résumé, Starring in Netflix’s the Crown Sixth – and Final – Season. He’s Set to Play Rupert Finch, Kate Middleton’s Then-Boyfriend and Romantic Rival to Prince William, According to Hello! Magazine.

How Did Sienna Miller and Oli Green Meet?

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Miller Has Been in the Spotlight for over Two Decades, but One of Her Most Highly Publicised Relationships Was with British Actor Jude Law. Law Proposed to Miller in 2004, but the Couple Split Two Year's Later After Law Confessed to Cheating on Miller with His Kids’ Nanny, per People.

Who Else Has Miller Dated?

Miller Has Been in the Spotlight for over Two Decades, but One of Her Most Highly Publicised Relationships Was with British Actor Jude Law. Law Proposed to Miller in 2004, but the Couple Split Two Year's Later After Law Confessed to Cheating on Miller with His Kids’ Nanny, per People.

Who Is Sienna Miller’s 26-Year-Old Boyfriend and Baby Daddy, Oli Green? He’s Modelled for Burberry, Starred in a Film with Florence Pugh, and Is Set to Play Kate Middleton’s Ex-Boyfriend in the Crown

By Elena Rostova

• Oct 8, 2026 • 4 min read

Who Is Sienna Miller’s 26-Year-Old Boyfriend and Baby Daddy, Oli Green? He’s Modelled for Burberry, Starred in a Film with Florence Pugh, and Is Set to Play Kate Middleton’s Ex-Boyfriend in the Crown

Direct Answer • Key Takeaway

So Who’s the Baby Daddy? Miller Is in a Relationship with Oli Green, an Actor Who’s 15 Year's Her Junior.

Elena Rostova

Lead Health, Wellness & Medical Journalist

Elena Rostova holds a Master's degree in Public Health Journalism. She covers groundbreaking medical research, holistic wellness trends, mental health awareness, and nutritional science.

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