Sienna Miller Confirms Engagement to Oli Green Weeks After Welcoming Their Second Child

Sienna Miller has confirmed her engagement to actor Oli Green, capping an eventful few months that have included the birth of their second child together. E! News broke the news on 4 June, after photographs taken during a trip to Spain showed Miller, 44, wearing a large diamond ring on her left hand. Green, 27, was with her at the time. Neither has made a formal public statement, but the ring's appearance on an outing that was clearly not intended to be private left little room for ambiguity.

The couple have been together since 2022, and the engagement follows the arrival of their newborn last month — Miller's third child overall. She also has a 13-year-old daughter, Marlowe, from her previous relationship with actor Tom Sturridge. Speaking to E! News shortly after the birth, Miller described the experience with characteristic warmth and honesty, noting she was running on little sleep but felt completely absorbed by her new arrival.

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Candid About the Realities of New Parenthood

Miller has not attempted to present a polished version of life with a newborn and a toddler. During an appearance on The Tonight Show in May, she gave a detailed account of a transatlantic flight she had taken with her two youngest children that, by her own description, went comprehensively wrong. The toddler, she said, had proved considerably more difficult to manage than she had anticipated — outstripping even her teenage daughter in terms of the challenge she posed. She described the flight as a genuine low point, recalling the experience of reaching the immigration queue and finding herself in tears.

The frankness is consistent with how Miller has generally approached public discussion of her personal life. She has spoken openly in recent years about the particular dynamics of her relationship with Green, including the 17-year age gap between them, and has pushed back against the suggestion that it is inherently unusual. In an interview with Harper's Bazaar in 2024, she reflected on what she described as a generational shift in how younger men approach relationships and treat their partners — attributing part of what works between them to that broader change, as well as to Green's individual qualities.

Green's Own Profile on the Rise

Oli Green is best known to British audiences for his role in The Crown, and his profile has grown steadily alongside his relationship with Miller. The couple have attended a number of high-profile events together and have made little effort to keep their relationship out of the public eye, though they have generally allowed photographs and appearances to speak for themselves rather than offering extensive commentary.

For Miller, the engagement represents yet another chapter in a career and personal life that have attracted consistent public interest since she first came to prominence in the mid-2000s. She remains one of the more recognisable figures in British celebrity culture, and the news of the engagement has been met with considerable warmth from those who have followed her story over the years. No details regarding wedding plans have been made public.

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