Sienna Miller is pregnant

The blonde beauty - who already has a daughter with boyfriend Oli Green, as well as Marlowe, 13, with ex Tom Sturridge - wore a see-through white dress over a small pair of white shorts at the glitzy event in the UK capital.

Sienna - who began her career as a model, before switching her focus to acting - hasn't made any public comment about her latest pregnancy. However, the actress previously revealed that she froze her eggs in order to future-proof her fertility.

The Edge of Love star admitted that she felt under pressure to have more kids while she still could.

Speaking to ELLE UK magazine in 2022, Sienna explained: "Biology is incredibly cruel on women in [their 30s] - that's the headline, or it certainly was for me.

"Then I got to 40 and I froze some eggs. 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."

Sienna was involved in a high-profile romance with actor Jude Law during her 20s, and the actress admitted that her life these days is almost unrecognisable from how it used to be.

The film star explained that she "can't quite believe" what she experienced during her younger years.

Sienna - who has been dating her 28-year-old boyfriend since 2022 - reflected: "It feels like somebody else's existence. I can go and visit it and look at it, but it doesn't feel like my life.

"I can't quite believe that it all happened. And not to put it specifically on that one thing, but just the chaos of the entire decade is so far removed from my life now."