Sienna Miller and Oli Green's Love Story From Halloween Surprise to Second Child
Actress Sienna Miller first encountered fellow performer Oli Green at a Halloween gathering hosted by a shared acquaintance, though their connection was not immediately romantic.
“My initial reaction was, ‘This is ridiculous; it won't lead to anything,’” she recounted to British Vogue in December 2023. “He put considerable effort into convincing me to join him for a beverage.”
Prior to Green, Miller was romantically involved with Jude Law intermittently between 2004 and 2011. Subsequently, she began a relationship with Tom Sturridge, lasting from 2011 to 2015, and they welcomed their daughter Marlowe in July 2012.
Following Miller's initial link with Green, Emily Blunt joined them on an early 2022 outing in New York City. Blunt shared with British Vogue that she observes “many qualities” of her long-term confidante in Green, particularly “the uninhibited, inquisitive, and innocent nature he possesses.”
A retrospective on Sienna Miller’s romantic partners includes Jude Law, Oli Green, and others.
The duo first appeared on a red carpet in March 2022. Over a year thereafter, news surfaced that Miller was expecting their first child. The Daily Mail verified in January 2024 that she had delivered a baby girl. Miller announced her pregnancy with her and Green’s second offspring at the British Fashion Awards in December 2025.
Continue below for a comprehensive chronological account of Miller and Green’s romance:
February 2022
Miller and Green's connection became public after they were observed on an outing in New York City.
March 2022
The pair was photographed departing Royal Albert Hall in London following the BAFTAs. Subsequently that month, Miller and Green formalized their relationship status on the red carpet at the Vanity Fair Oscar Party in Beverly Hills.
April 2022
Miller disclosed to Elle UK her decision to undergo egg freezing upon reaching age 40. She expressed that the urgency imposed by her biological clock created a “very pronounced concern.”
“Biological factors are immensely harsh on women during that ten-year period — that’s the main point, or it certainly felt that way for me,” she elucidated. “Upon turning 40, I had eggs cryopreserved. After being intensely preoccupied with the desire for another child, my mindset is now more 'if it occurs, it occurs.' That particular apprehension has faded.”
August 2023
A month after speculation of her pregnancy arose in St. Tropez, Miller displayed her expanding baby bump in a bikini during a holiday in Ibiza.
September 2023
Miller showcased her visible pregnancy bump in an off-white Schiaparelli outfit at the Vogue World: London function.
December 2023
Miller adorned the cover of British Vogue at 28 weeks pregnant and spoke candidly about her partnership with Green. Coincidentally, the couple had just transitioned into their own residence, having previously resided at Green’s parents' home in West London.
“I believe one cannot dictate affairs of the heart,” she stated, commenting on the 14-year age difference between her and Green. “Personally, I have never been capable of doing so.”
January 2024
Reports emerged confirming Miller had delivered their daughter.
May 2024
Miller recounted her Maldivian getaway with Green, disclosing that this "babymoon" marked their inaugural trip as a couple. “As Oli and I got ready for the journey, we became aware that we had never actually gone on a vacation, just the two of us, throughout our whole relationship,” she penned in a piece for The Sunday Times. “Thus, it was truly enchanting to share that period, focusing on one another and the impending arrival of our baby.”
June 2024
“I hadn't anticipated taking it seriously,” Miller confided to Harper’s Bazaar regarding the nascent stages of her and Green’s courtship. “However, I soon found myself deeply in love.”
Miller remembered being taken aback by Green’s youth upon their introduction. “My intention wasn't to 'find a younger partner,'” she recounted. “It was more akin to, ‘Damn! Why are you so young? How irritating.'”
Reflecting on it, the actress noted that their 14-year age difference has, in fact, proven beneficial. “There’s a distinct way that generation of men shows deference to women,” Miller further explained. “While it’s particular to him — he is notably discerning and balanced — I genuinely think it’s also characteristic of that demographic. They’ve matured with a somewhat more equitable environment. I observe this in his female acquaintances as much as in the men.”
December 2025
Miller showcased her pregnancy bump at the British Fashion Awards in December 2025, announcing that she and Green are anticipating their second child.
