Portman and her husband, dancer and choreographer Benjamin Millepied, whom she met on the set of Black Swan, are already parents to son Aleph, 5.
While usually very guarded about her private life, just a couple months ago, Portman opened up about fitting motherhood into her career as an actress, and vice versa.
"I will never have the boredom or repetitiveness of an office," Portman wrote in an email exchange published in The New York Times’ T Magazine. "But every job takes me to a new place with a new schedule, and it requires a reinvention of ritual each time, even more so with a family."
"When I'm not working, I’m pretty much exclusively with my family, so my rituals have to do with school, meal preparation, playdates, bedtime," she added, also noting that her son's hobbies include Lego Batman and Harry Potter.