Sienna Miller Engaged to Oli Green After Welcoming Their 2nd Baby

Sienna Miller Welcomes Baby No. 3, Her 2nd With Boyfriend Oli Green

Sienna Miller and Oli Green are taking a major step in their romance.

On the heels of welcoming their second baby together, the American Sniper actress and The Crown actor are now officially engaged.

Miller sparked engagement rumors when she stepped out in Spain sporting a massive diamond ring on that finger June 4. And E! News can confirm that it is, in fact, an engagement ring.

During the outing, Green appeared to put her ring on full display, sporting sunglasses, jeans and a jacket draped around her shoulders. The 44-year-old—mom to Marlowe, 13, with ex Tom Sturridge, as well as two younger children with Green—walked with her hands placed delicately in front of her, keeping her ring a focal point of her look.

And while Miller and Green—who started dating in 2022—are taking a major step with their engagement, this year has already been major for them as they confirmed the arrival of their second baby last month.

“It’s happened,” Miller quipped to E! News at the time. “I have a tiny baby next door.”

The Jack Ryan actress mused of welcoming their family’s new addition, “I’m on very little sleep but I’m madly in love with my baby.”

As for how she’s juggling life as a newfound mom of three? Miller recently shared insight into which of her kids has been the hardest to parent as of late.

“I would have said the teenage girl would be harder to juggle until the transatlantic flight I took yesterday with the toddler and the newborn,” she joked during an appearance on The Tonight Show May 14. "The toddler now wins hands down. It was an absolute disaster. There’s no negotiating.”

Lucy North/PA Images via Getty Images

Indeed, Miller admitted that flying with her kids was a particular struggle.

“The looks people give you on the flight,” she recalled. “The baby’s screaming, she’s screaming. It was like, 'Yeah.' I got to the immigration line and just broke down.”

Of course, Green is always there to pick her back up. In fact, Miller has shared how her relationship with the 27-year-old changed her mind on dating someone younger.

"There is a difference in the way that generation of men respect women,” she told Harper’s Bazaar in 2024. “It’s specific to him, he is very wise and well-adjusted, but I do believe it’s also that generation. They have grown up with a slightly more level playing field.”

For more stars who have gotten engaged this year, keep reading…

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