Sienna Miller gives birth to 3rd baby, her second with boyfriend Oli Green

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Sienna Miller’s brood conscionable sewage bigger.

The 44-year-old character has given birth to babe No. 3, welcoming her 2nd kid pinch fellow Oli Green.

She revealed nan news successful an question and reply pinch E!, telling Will Marfuggi, “It’s happened. I person a mini babe adjacent door.”

“It feels for illustration stringing sentences together is simply a spot challenging,” she added playfully. “I’m connected very small slumber but I’m madly successful emotion pinch my baby.”

Sienna Miller (pictured supra successful December 2025) and fellow Oli Green’s 2nd kid together has arrived. Gareth Cattermole/Getty Images for BFC
The small 1 is babe No. 3 for nan character (pictured supra connected March 12). BACKGRID

However, she did not uncover erstwhile she gave birth, nan baby’s sanction aliases sex.

The mates besides shares a daughter, 3, but person yet to uncover nan toddler’s name.

Miller, additionally, is nan mother of daughter Marlowe, 12, whom she co-parents pinch ex-fiancé Tom Sturridge.

The erstwhile mates broke up successful nan summertime of 2015 aft 4 years together, and Miller concisely moved connected pinch businessman Lucas Zwirner earlier going nationalist pinch Green, 29, successful precocious 2021.

She co-parents girl Marlowe (pictured supra successful April 2025) pinch ex-fiancé Tom Sturridge. Dave Benett/Getty Images for Savannah Miller Bridal
The erstwhile mates (pictured supra successful September 2013) collapsed up successful July 2015. Chris Jackson

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The duo has chiefly kept their romance retired of nan spotlight complete nan years.

The model, however, said retired to take sides nan pair’s property spread successful December 2023.

“I would ideate it would beryllium analyzable for anyone to get their caput around, but there’s been thing but emotion and joy,” Miller insisted to Vogue astatine nan time.

While acknowledging she “might want to beryllium pinch personification older,” nan Golden Globe nominee said it isn’t imaginable to “legislate connected matters of nan heart” and she “certainly [has] ne'er been capable to.”

Miller went nationalist pinch Green (pictured supra successful May 2024) successful early 2022. Getty Images
The duo (pictured supra successful July 2025) person a 14-year property gap, which Miller often defends. WireImage

Green, notably, did person to “work hard” to seduce his now-partner to spell connected a day owed to their property difference.

Miller confessed she initially thought their relationship was “absurd” and wouldn’t “go anywhere.”

She noted to Harper’s Bazaar nan pursuing twelvemonth that “there is simply a quality successful nan measurement that procreation of men respect women.”

The exemplary (pictured supra successful June 2022) initially thought nan “absurd” relationship would not last. Corbis via Getty Images
Miller (pictured supra successful December 2025) revealed successful 2024 that she and Green were staring a family, pinch nan backstage mates keeping their 3-year-old’s sanction nether wraps. Gareth Cattermole/Getty Images for BFC

“He is very wise and well-adjusted, but I do judge it’s besides that generation,” Miller speculated successful June 2024. “They person grown up pinch a somewhat much level playing field.”

Most recently, nan “Anatomy of a Scandal” prima opened up to Grazia successful March astir really “the thought of an older female pinch a younger man … is still fetishized alternatively than normalized.”

She quipped, “There’s a disparity location that I would emotion to spot disappear.”

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