The 38-year-old actor confirmed the news that she was expecting baby number two, reported DavidJones.Com.
"I'm a little tired but feeling good. Everyone was very sweet on set today, and you always get a little bit more attention when you're pregnant, which is fabulous," Byrne said.
The "X-Men: Apocalypse" actor already has one-and-a-half year-old son, Rocco with Cannavale.
On the work front, Byrne was spotted shooting in England for her "Juliet, Naked" earlier this month.
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