Sienna Miller Reportedly Engaged After Welcoming 2nd Child With Partner

Sienna Miller is reportedly engaged to Oli Green, shortly after welcoming their second baby together. The report comes after the actress fueled engagement rumors earlier this month. Fans spotted Miller rocking an engagement ring earlier.

Sienna Miller reportedly engaged to Oli Green

Sienna Miller is engaged to her longtime partner, actor and model Oli Green, according to E! News. The report comes shortly after the Anatomy of a Scandal star revealed that the couple had welcomed their second baby.

Miller and Green had first sparked engagement rumors when the pair was photographed in Barcelona, Spain, in the first week of June. The photos captured the actress wearing what appeared to be an engagement ring.

In an exclusive interview with E! News’ Will Marfuggi, Miller announced that she has welcomed her second baby with partner Oli Green. “It’s happened,” the actress revealed, adding, “I have a tiny baby next door.”

Miller continued, “It feels like stringing sentences together is a bit challenging.” She added, “I’m on very little sleep, but I’m madly in love with my baby.”

Notably, Miller also has a 13-year-old daughter named Marlowe, whom she had with her former fiancé, Sandman actor Tom Sturridge.

The actress reportedly began dating Oli Green in late 2021 or early 2022, welcoming their first baby in December 2023. They have made multiple public appearances together since then. The couple attended the 2022 Vanity Fair Oscars after-party and also walked the red carpet together. Last year, fans spotted them together at the Oasis concert at Wembley Stadium in July 2025.

Meanwhile, Miller has recently returned to the screen, featuring in Tom Clancy’s Jack Ryan: Ghost War, where she plays M16 officer Emma Marlowe. The actress also spoke about how it was working with John Krasinski on the show.

“I loved it,” Miller said, adding, “I haven’t done anything really like this before and to play someone who is incredibly unapologetic, incredibly tough and bold and brave and pretty funny and dry and very cool—it was thrilling” (via E! News).

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