Sienna Miller, 41, pregnant with second child after freezing eggs

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Sienna Miller is proudly showing off her baby bump while vacationing in Ibiza.

The "American Woman" actress, 41, was seen in a brown bikini with a long skirt positioned just underneath her growing stomach. Miller — who is dating boyfriend Oli Green, 26 — is expecting her second child. She shares her daughter, Marlowe, 11, with her ex, actor Tom Sturridge.

Fox News Digital has reached out to a rep for Miller for comment.

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Sienna Miller, 41, shows off baby bump while vacationing in Ibiza. (MEGA)

In an interview with Elle in 2022, Miller admitted feeling "pressure" to have more children in her 20s and 30s. She also revealed after she turned 40, she decided to freeze her eggs. 

The actress explained that she felt "pressure... [about] kids, and should I have more, and why haven’t I, and all of that, which is a really loud noise." 

She continued, "Biology is incredibly cruel on women in that decade — that’s the headline, or it certainly was for me."

Sienna Miller, 41, decided to freeze her eggs when she was 40. This will be her second child. (Rich Polk/Getty Images for IMDb)

"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," Miller said.

Oli and Sienna were first spotted out and about together in February 2022, according to E! News. In an interview with British Vogue that same year, Miller explained her relationship with Green helped change her outlook on relationships and marriage.

"I'd invested what felt like the important years in something that was just a bucket with a hole in it of a person," she told the outlet. "And I felt like time was really my currency. There was a lot of anxiety. Relationships hadn't worked out — I imagined that I would be married with three kids, being a great mum."

Sienna Miller is currently dating Oli Green. The two have reportedly been together since February 2022. (Zac Goodwin/PA Images)

Although her dreams of her future didn't pan out as expected, Miller is very proud to be a mother.

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"I love being a mother," Miller said. "It's what I do best."

Miller has faced her fair share of ups-and-downs in relationships. She was previously engaged to Jude Law in 2004, before calling off their engagement after his affair with his children's nanny, Daisy Wright, came to light.

In 2022, Miller starred in Netflix's "Anatomy of a Scandal," which mirrored her previous relationship. Her character was married to a politician whose affair became the center of a media frenzy.

"It was weirdly interesting to kind of step back in and... There is something cathartic, I suppose, about spending time in an ugly space that's familiar," Miller told Elle U.K. in 2022. "And maybe reclaiming it? I don't know what the psychology of it is. But there is something where maybe you can substitute a memory with something else." 

Miller and Green made their red carpet debut as a couple in March 2022. (Darren Gerrish/WireImage)

In 2019, Miller spoke with People magazine about motherhood and how her daughter "challenges" her "and is a real mirror."

"When you are raising a child you see aspects of your character in that person, reflected back, and it's the most loving, intense relationship that I have," she said at the time. "There's nowhere to hide."

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"She knows me, I know her," Miller continued. "She's really stubborn, which is very like me. I see her as her own person but I also see genetic things. She's heaven, my kid."