Sienna Miller on 14-Year Age Difference with Boyfriend Oli Green: 'Nothing but Love and Joy'

Love is love for Sienna Miller.

The actress, who turns 42 this month, opened up to Vogue in a cover interview for the magazine's Winter 2024 issue about expecting her and boyfriend Oli Green's first child together, and their 14-year age gap.

"I would imagine it would be complicated for anyone to get their head around, but there’s been nothing but love and joy," Miller said of her relationship with Green, 27.

But for her beau, "It is real that I might want to be with someone older," said the American Woman star.

At the end of the day, though, “I don’t think you can legislate on matters of the heart," Miller said. "I certainly have never been able to."

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Miller told Vogue that when she's with Green's friends, "There’s awareness of the dynamics that enter relationships between men and women now that we just didn’t have 20 or 25 years ago."

"I feel like my whole adolescence was dodging bullets and advances in a really delicate way, to not offend somebody," she continued. "Whereas the girls that he grew up with, they’re probably like, No — no, thank you. Moving on."

Elsewhere in the interview, Miller recalled the beginning of their romance, when they kissed early on after meeting. But then she pulled back.

“I was like, 'This is absurd. This will not go anywhere,'" the Live by Night actress said. “And then he worked hard to persuade me to go out for a drink with him.”

Emily Blunt, a close friend of Miller's, told Vogue that her pal — who is expecting a baby girl with Green and is already mom to daughter Marlowe, 11 — "just needed the right person" to have another child with, which is something Blunt "really see(s)" in Green.

“I see so much of her in [Oli],” added Blunt, 40, “in that free-spirited, curious, guileless thing that he has. He’s the kind of guy you could just bring anywhere, and everyone would love him.”

She also shared a story about one of Miller and Green's first dates in New York City, when Blunt came along for support — the kind that didn't end up being needed.

"When I got there, it was so beautiful between them. I just gave her a hug and went, ‘I’m going to slip away,' " Blunt said.