Pregnant Sienna Miller flaunts baby bump, poses with 11-year-old daughter Marlowe for Vogue photoshoot

She’s got that new mom glow.

Sienna Miller showed off her growing baby bump on the cover of Vogue’s winter issue, released Wednesday, revealing her bare tummy in a relaxed beach shot.

The “Alfie” star, 41 — who confirmed she is expecting her second daughter and first child with boyfriend Oli Green, 27 — posed in an oversized black sweater with a bikini bottom on the magazine’s cover, hiking the knitwear up to reveal her bare belly.

Miller paired the cozy look with a pair of boots as she joined 11-year-old daughter Marlowe, whom she shares with ex Tom Sturridge, for a joyful pic, with the mother/daughter duo running on the beach as their hair blows in the wind.

Marlowe wore a Zara outfit featuring a chunky ivory sweater and pleated plaid miniskirt for the Vogue shoot, adding a pair of green rubber wellies.

Miller looked ethereal in a red Valentino gown. Annie Leibovitz for Vogue
The actress is expecting a baby with boyfriend Oli Green, who stars in the new season of “The Crown.” Annie Leibovitz for Vogue
Marlowe joined her mom at New York Fashion Week in February. Getty Images for NYFW: The Shows

The 11-year-old is actually a Vogue veteran, having made her debut in the mag at the ripe old age of two for her mom’s January 2015 cover story.

Marlowe has also accompanied her famous mom to New York Fashion Week in February, sporting a gray trouser suit with Nike sneakers and a Dior bag as she sat front row at the Proenza Schouler show.

As for Miller, she modeled a range of other stunning maternity outfits during her shoot, including a billowing red Valentino gown she wore in a dreamy waterfront picture and a pinstriped Dolce & Gabbana suit she wore open to put her bump on display.

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Miller rocked a Dolce & Gabbana suit with her bump peeking out. Annie Leibovitz for Vogue
She showed off her belly in a beaded gold Miu Miu dress. Annie Leibovitz for Vogue
Green joined his girlfriend in the stands at Wimbledon this summer. PA Images via Getty Images

She also posed with Green on a grassy dune, telling Vogue of their 14-year age difference, “I don’t think you can legislate on matters of the heart. I certainly have never been able to.”

Miller first revealed her pregnancy in August after photos surfaced of the star rocking a baby bump on the beach in Ibiza. She told Vogue that she was “nervous about the idea” of baring her tummy in a two-piece couture outfit at the Vogue World event in September, but later was happy about the bold red carpet look.

The “Layer Cake” actress shared, “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.”