Oscar winner Natalie Portman is making waves at the Venice Film Festival with her performances in the films "Planetarium" and "Jackie." And the actress had another exciting debut to share as the walked the red carpet on Thursday: A baby bump.

Portman is expecting her second child with husband Benjamin Millepied, People has confirmed. The 35-year-old actress showed off her growing bump as she posed for photos in a gorgeous, form-fitting white Valentino gown before Thursday's "Planetarium" premiere.

Portman is already mom to 5-year-old son Aleph with Millepied, who she married in 2012. The pair met on the set of Darren Aronofsky's 2010 ballet thriller "Black Swan," which Millepied choreographed and which netted Portman the Academy Award for Best Actress.

It's unclear how far along the actress is, and neither she nor Millepied has spoken publicly about her pregnancy yet. Regardless of whether or not she chooses to discuss her impending new addition, Portman will be in the public eye for the foreseeable future, thanks to how much Oscar buzz is currently surrounding her performance in "Jackie," a biopic about former first lady Jacqueline Kennedy Onassis. Expect her to make the press rounds over the next few months in support of the flick.

Congrats to the growing family!

[via: People]

Photo credit: AFP/Getty Images