Pregnant Sienna Miller bares baby bump in billowing couture at Vogue World: London: ‘Mama goose but H๏τ’

Sienna Miller took a page out of Rihanna’s pregnancy style playbook at the Vogue World event at London’s Theatre Royal Drury Lane Thursday.

The pregnant actress, 41, debuted her baby bump on the red carpet in daring fashion, modeling a two-piece Schiaparelli Haute Couture look comprised of a collared crop top and matching cream puff-style skirt.

Fans were split on Miller’s high-fashion maternity outfit, with one commenting on Check The Tag’s Instagram page, “You know what, LOVE, she’s giving Mama goose but H๏τ.”

Added another, “This is what I thought Rihanna was going to do at the Oscar’s [sic],” while a third wrote, “I’m not sure how I feel abt the look but I absolutely love this H๏τ young boyfriend and this new baby for her.”

It’s the “American Sniper” star’s second child — and her first with 26-year-old beau Oli Green, with whom she’s been linked since February 2022. Miller first revealed her bump in a ʙικιɴι during a beach getaway in Ibiza last month.

Miller shares 10-year-old daughter Marlowe with ex Tom Sturridge, who is currently dating Alexa Chung — and it seems fashion runs in the family, as the pre-teen sat front row at NYFW earlier this year with her mom, where she also posed with Chung.

Miller shared in April 2022 that she froze her eggs when she turned 40 years old after struggling with “pressure” to have “more kids” in her 30s.

“Having been really focused on the need to have another baby, I’m just like, ‘If it happens, it happens.’ That kind of existential threat has dissipated,” she told Elle UK at the time.

Joining Miller on the star-studded Vogue World red carpet were Rita Ora, Kate Winslet, Dove Cameron and more major names — along with the magazine’s EIC, Anna Wintour, of course.

The second annual Vogue World event will celebrate British theater and fashion, with a live runway show showcasing creations from various designers to kick off London Fashion Week.