Sienna in Bloom

She's living a different kind of whirlwind-new love, new home, new baby on the way (it's a girl!). Ahead of the epic Western Horizon, Sienna Miller talks to Chloe Schama about the happy, hectic joys of life now.

- By Chloe Schama. Photographed by Annie Leibovitz

On the morning I meet Sienna Miller in London, she has just attended a prenatal yoga class the first went down pregnancy. She the street to the neighborhood place and was reminded of how pleasant it is to be in the presence of other pregnant women. Also, no one blinked. Or if they did, she tells me, they did "a very good job hiding it."

Miller, 41, is already mother to Marlowe (whom she co-parents with the actor Tom Sturridge), and now is having another girl. She's 28 weeks into the pregnancy, with boyfriend Oli Green, 27, an actor with whom she has been in a relationship since 2021. Today she's dressed in a black tank top and roomy, low-hanging Levi's, held up by what looks like a silk sash; her hair is hanging long and loose in a way that many a stylist would undoubtedly spend hours trying to emulate. Two dogs-Walter, a mini dachshund, and Tennessee, a rescue from the American Southswirl around our ankles as we form a plan. The agenda had been refreshingly vague-though she warns me that she's starving.

There was a time when Miller's life was far more prescribed by external pressures, dictated by the punishing rhythms of paparazzi chases and high-profile romances. But if her schedule now allows for morning yoga and improvised lunches, it's also a different kind of whirlwind. She's arguably at a creative peak, having delivered a series of complex, nuanced performances in recent years: a mother coming to terms, over the course of decades, with the disappearance of her daughter in 2018's American Woman; the wronged wife of a Tory MP in the delicious 2022 Netflix series Anatomy of a Scandal. Last spring, she finished shooting the second installment of Kevin Costner's Horizon: An American Saga, a Civil War-era, multi-film opus that covers a 15-year period during the settlement of the American West.