Sobieski, 31, revealed that she was expecting again when she stepped out to attend the Christian Dior Cruise 2015 fashion show at the Brooklyn Navy Yard in NYC on May 7. She made no announcement, but her noticeable baby bump said it all.
Sobieski and menswear designer Kimmel are already parents to daughter Louisanna Ray, 4, whom they lovingly call "Lewi."
Back in May 2010, the Here on Earth actress explained why she wanted to start a family so young.
"We fell in love. I wish I had a girlfriend that had a baby. That would be so nice," she said to New York Magazine at the time. "I feel like I'm doing this thing that's really weird, but I look around me and realize that everyone has babies." She added: "People in the middle of America have babies at my age."
In 2012, she also noted how hectic running after Lewi could be. "Like most moms, I'm always busy," she told Vogue. "Giving Lewi a bath, buying milk, cleaning something, making some decision, reading weird baby blogs, worrying I disciplined in the wrong way." When the family has a nice night in, however, she stops the worrying and does some cooking. "I don’t follow directions," she admitted, "but I make good experiments—they usually involve a lot of cheese."