Sienna Miller and her partner Oli Green are set to tie the knot following the confirmation of their engagement in June 2026. The announcement came shortly after Miller was seen wearing a diamond ring in public earlier that month, marking a significant moment in their relationship, which began in early 2022.
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The couple first caught the public’s attention as they were spotted leaving the BAFTA Film Awards together in March 2022. Their romance quickly garnered interest from fans and media alike, leading them to make their red carpet debut at the Vanity Fair Oscar party later that year.
As their relationship flourished, Miller and Green expanded their family. The couple welcomed their first child, a daughter, around two years into their romance. In December 2025, Miller made headlines when she showcased her baby bump at the Fashion Awards in London. By May 2026, during an interview with E! News, she confirmed the arrival of their second child.
Oli Green, who is an accomplished actor and model, has made a name for himself in both fields since studying at the Strasberg Theatre & Film Institute in New York. His acting career began with smaller roles, one of his earliest being in John Eatherly’s music video “Burnout.” Since then, he has appeared in television series such as “The Crown,” “The Mosquito Coast,” and “A Good Person.”
Beyond his acting pursuits, Green has also carved out a successful modelling career. He has worked with high-profile brands, including Burberry, and was notably featured in Gap’s “I Am” campaign. In a significant collaboration, he and Miller became the first couple to be featured in a Frame denim campaign, which was photographed by Erik Torstensson, a long-time friend of Miller’s.
The couple has been spotted together at various prestigious events, including British Vogue’s Fashion and Film Party, the Prince’s Trust Global Gala, and the Glastonbury Festival. They have also enjoyed personal time together, attending sporting events such as Wimbledon and the French Open, as well as going on vacation.
In addition to their public appearances, Miller and Green have embraced family life. In August 2023, speculation about Miller’s second pregnancy was confirmed after she was photographed with a visible baby bump during a beach outing in Ibiza. By January 2024, the couple had been seen together with their newborn, displaying the joy of parenthood.
With a 15-year age difference between them—Miller being the elder—both have discussed how this dynamic influences their relationship. During a Harper’s Bazaar interview in June 2024, Miller shared her feelings about dating a younger man, noting that she fell in love with Green quickly and appreciating his maturity despite the age gap.
The engagement news followed shortly after the couple welcomed their second child, marking a new chapter in their lives. As they prepare for their wedding, fans and followers are eager for insights into their future together, particularly after Miller, in a recent interview, expressed her deep affection for her newborn, although she kept details regarding the baby’s name and gender private for now.
In a whirlwind romance that has evolved from public appearances to joyful family moments, Sienna Miller and Oli Green continue to attract attention as they navigate their personal lives and careers. As their love story unfolds, the couple’s journey appears to be leading towards a promising future together.