Natalie Portman Is Pregnant With Second Child, Debuts Baby Bump on Red Carpet at Venice Film Festival

Natalie Portman is expecting baby No. 2!

The notoriously private actress has yet to confirm the news herself, but a source confirms to ET that the Oscar winner is indeed expecting. 

Meanwhile, there was certainly no hiding her burgeoning belly at the premiere of her new film, Planetarium, at the Venice Film Festival on Thursday.

WATCH: Natalie Portman Reveals Cate Blanchett's Perfect Advice About Being a Working Parent

Portman proudly put her baby bump on display as she posed on the red carpet in a stunning white floor-length Dior gown, which hugged her curves in all the right places.

Portman looked noticeably fuller as she beamed from ear to ear, posing with Planetarium co-star Lily-Rose Depp.

WATCH: Johnny Depp's Daughter Lily-Rose and Natalie Portman Look So Much Alike It's Scary!

The 35-year-old actress was able to better keep her pregnancy under wraps earlier at the festival, as she opted for more flowy dresses.

Earlier on Thursday, Portman stepped out in a cute, loose-fitting mini-dress, accessorizing her look with strappy sandals and minimal jewelry.

WATCH: 'Thor' Actress Natalie Portman Says She's 'Done' Making Marvel Movies

And on Wednesday, the Harvard alum concealed her pregnancy in two looks while she promoted her other film, Jackie: a floral patterned cap-sleeved dress and a stunning black-and-white Valentino number.

RELATED: Natalie Portman Perfectly Channels Jackie Kennedy in First Photo From New Biopic

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.

RELATED: Natalie Portman Loves Her New Home in Los Angeles After Living in Paris: 'Everyone Smiles A Lot Here!'

See more in the video below.

Natalie Portman Talks Juggling Motherhood and Acting in an Intimate Email Exchange

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