Sienna Miller is pregnant with baby girl No. 2, bares baby bump on Vogue cover

Sienna Miller's family is growing!

The "Anatomy of a Scandal" star confirmed she's pregnant with another girl, displaying her baby bump in a cropped sweater the the cover of Vogue.

Miller is 28 weeks and expecting with her boyfriend, actor Oli Green.

"I felt so bad that Marlowe didn't have a little partner in crime," she told Vogue of her journey to becoming pregnant.

Emily Blunt, who was also interviewed by the outlet, added, "We've talked about it for years. She just needed the right person, and I really see that in (Oli)."

Rumors of Miller's pregnancy swirled in August as she was photographed with a growing bump while in a bikini in Ibiza, as seen in photos shared exclusively with People magazine. USA TODAY reached out to Miller's reps for confirmation.

In September, Miller stunned in a two-piece Schiaparelli look that showed off her pregnant belly at the start of London Fashion Week during the Vogue World: London event. Miller posed for the cameras, clasping her hands on her stomach.

"I was nervous about the idea of it," she told Vogue of showcasing her bump on the red carpet. "But once I had it on, everything else felt boring. I was like, I’ll have that photo for the rest of my baby’s life. It’s kind of fascinating to fight your own prejudice against yourself. I'm constantly doing that."

This will be the second child for Miller, 41, who welcomed daughter Marlowe in 2012 with "The Sandman" star Tom Sturridge, her former fiancé. Miller was first spotted with Green, 27, last year.

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Miller revealed she froze her eggs at 40 in a 2022 interview with Elle UK.

"Having been really focused on the need to have another baby, I'm just like if it happens, it happens," she said. "That kind of existential threat has dissipated."

Miller spoke of the "endless" joy motherhood brought with Vogue in an interview published in April.

"You become aware that someone is just infinitely more important than you ever are and that is incredibly relieving," Miller said. "I think it was the first time that I suddenly did the math on what life was and I'm grateful for that because it makes you treasure each moment."

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This article originally appeared on USA TODAY: Sienna Miller pregnant, expecting baby girl: See Vogue cover reveal