Sienna Miller Pregnant With Baby No. 3 at 43

Iconic Style, Baby Bump Surprise: Sienna Miller Welcomes Third Pregnancy

In a revelation that captivated fashion and celebrity circles alike, actress and style icon Sienna Miller, 43, has officially announced her third pregnancy. The star made the stunning debut on the red carpet of the 2025 British Fashion Awards on Monday, December 1, where she turned heads in a breathtaking sheer white Givenchy gown that elegantly showcased her burgeoning baby bump.

[IMAGE_1: Sienna Miller posing in her sheer white Givenchy gown at the British Fashion Awards]

A Fashion-Forward Pregnancy Reveal

Miller's announcement wasn't confined to a simple statement – it was a masterclass in bold maternity style. The actress chose a completely sheer, strapless empire-waist gown by Givenchy, featuring a plunging neckline and delicate tulle cape detailing. She completed the look with her signature bohemian aesthetic: loose platinum blonde waves, middle-parted curtain bangs, and subtle pearl drop earrings. The ensemble, which revealed only a pair of white underwear beneath the diaphanous fabric, perfectly embodied her fearless approach to fashion.

"I'd love to get to a point where I didn't feel the need to make a joke of my being older and having a baby," Miller shared in a previous interview. "To show I'm in on the joke."

The Fashion Awards appearance wasn't just a solo affair either. Miller was accompanied by her boyfriend, Oli Green, and her 13-year-old daughter from her previous relationship with Tom Sturridge, Marlowe. The family trio posed together, with Miller subtly cradling her bump during photos – a poignant moment that highlighted her expanding family unit.

Journey to Motherhood: From Egg Freezing to Baby No. 3

Miller's pregnancy journey has been marked by both public openness and personal resilience. In a candid 2023 interview with Elle UK, she revealed the pressures she faced in her 30s regarding fertility and family planning.

[IMAGE_2: Sienna Miller and Oli Green vacationing with their daughter]

"Biology is incredibly cruel on women in that decade [of their 30s] – that's the headline, or it certainly was for me. Then I got to 40 and I froze some eggs," Miller shared at the time. "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."

Her journey took an unexpected turn when she met Green in 2022. Despite a 14-year age gap that initially surprised her – "I wasn't like, 'I'm gonna get a younger boyfriend.' It was more, 'F***! Why are you young? That's so annoying.'" – Miller found a deep connection. She has since praised Green's generation for their respectful approach to relationships, noting "There is a difference in the way that generation of men respect women... They have grown up with a slightly more level playing field."

After welcoming their first child together, a baby girl in January 2024, Miller's family continues to grow. Her eldest daughter, Marlowe, shares half-siblings with her soon-to-be-born sibling, creating a unique blended family dynamic. The couple has kept their children's names private, maintaining a boundary between their public personas and private family life.

What's Next for Miller

As Miller embraces this new chapter, she continues to balance her thriving career with motherhood. Known for her roles in films like Factory Girl and G.I. Joe, and her influential street style, the actress has proven that motherhood at 43 is both possible and fashionable. Her journey resonates with many women navigating fertility challenges and redefining family structures in modern times.

The fashion world eagerly anticipates how Miller's pregnancy style will evolve, while fans celebrate her happiness and the expansion of her beautiful family. As she navigates this joyous time, one thing remains certain: Sienna Miller continues to inspire with her authenticity, resilience, and unwavering sense of self.