Isla Fisher is expecting her third child with husband Sacha Baron Cohen, Us Weekly can exclusively confirm -- see her baby bump Credit: Michael Buckner/BAFTA LA/Getty Images

Another on the way! Isla Fisher is pregnant and expecting her third child with husband Sacha Baron Cohen, Us Weekly can exclusively confirm.

The Aussie actress, 38, was spotted rocking a small baby bump while running errands in London on Tuesday, Sept. 23. She wore a loose-fitted blue top, baggy jeans and covered up in a white blazer.

The happy news will bring changes to both Fisher's personal and professional life. An insider tells Us that the expectant star has pulled out of Now You See Me 2 to concentrate on her pregnancy. "Production starts in November and she knew she wouldn't be able to do it," an insider tells Us. The pal adds: "She's about three months along."

Fisher and Borat's Cohen, 42, wed in Paris in March 2010 and are already parents to daughters Olive, nearly 7, and Elula, 4.

Despite their hectic acting schedules, Fisher has always put family first. "Family is 100 percent my top priority. So I'm much more comfortable doing supporting roles right now. And often," she told The Telegraph in July 2013. "They're the most interesting," the star reasoned. "You get to be a character actress."

The London-based couple are extremely private about their marriage, but Fisher did open up about her two previous pregnancies to Fitness magazine in April 2013.

"I gained 65 pounds with my first baby and 70 with my second," she revealed. "I had severe morning sickness both times, so I mostly ate supersize bowls of white pasta with loads of butter and cheese because that was the only thing that took away the nausea."

Fisher turned to yoga to lose the baby weight, and admitted she's most proud of her stomach. "Even though it will never be flat again, it's still my favorite because it reminds me of my greatest achievement: my babies," she said.