Natalie Portman is pregnant with baby No. 2, debuts baby bump

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Natalie Portman has a baby on the way!

The 35-year-old actress debuted a growing baby belly at the premiere of her film "Planetarium" at the Venice Film Festival on Thursday, September 8.

The Oscar winner wore a blush pink, one-shouldered gown, which clung to her maternity curves. She wore her hair pulled back and was absolutely glowing. Onlookers at the festival said Portman was affectionately rubbing her belly as she walked down the red carpet.

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Natalie Portman debuts baby bump
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Natalie Portman debuts baby bump
Actress Natalie Portman attends the red carpet for the movie "Planetarium" at the 73rd Venice Film Festival in Venice, Italy September 8, 2016. REUTERS/Alessandro Bianchi
Actress Natalie Portman attends the red carpet for the movie "Planetarium" at the 73rd Venice Film Festival in Venice, Italy September 8, 2016. REUTERS/Alessandro Bianchi
Actress Natalie Portman attends the red carpet for the movie "Planetarium" at the 73rd Venice Film Festival in Venice, Italy September 8, 2016. REUTERS/Alessandro Bianchi
VENICE, ITALY - SEPTEMBER 08 : Natalie Portman (L) , Lily-Rose Depp (R) attend the premiere of the movie 'Planetarium' during 73rd Venice Film Festival at Venice Lido in Venice, Italy on September 08, 2016. (Photo by Primo Barol/Anadolu Agency/Getty Images)
VENICE, ITALY - SEPTEMBER 8: Actress Natalie Portman attends the premiere of the movie 'Planetarium' during 73rd Venice Film Festival at Venice Lido in Venice, Italy on September 08, 2016. (Photo by Primo Barol/Anadolu Agency/Getty Images)
VENICE, ITALY - SEPTEMBER 8: Actress Natalie Portman attends the premiere of the movie 'Planetarium' during 73rd Venice Film Festival at Venice Lido in Venice, Italy on September 08, 2016. (Photo by Primo Barol/Anadolu Agency/Getty Images)
VENICE, ITALY - SEPTEMBER 08: Natalie Portman attends the premiere of 'Planetarium' during the 73rd Venice Film Festival at Sala Grande on September 8, 2016 in Venice, Italy. (Photo by Stefania D'Alessandro/WireImage)
VENICE, ITALY - SEPTEMBER 08: Lily-Rose Depp and Natalie Portman attend a premiere for 'Planetarium' during the 73rd Venice Film Festival at Palazzo del Cinema on September 8, 2016 in Venice, Italy. (Photo by Camilla Morandi - Corbis/Corbis via Getty Images)
VENICE, ITALY - SEPTEMBER 08: (R-L) Actor Emmanuel Salinger, director Rebecca Zlotowski, actresses Lily-Rose Depp and Natalie Portman attends the premiere of 'Planetarium' during the 73rd Venice Film Festival a Sala Grande on September 8, 2016 in Venice, Italy. (Photo by Danny Martindale/FilmMagic)
VENICE, ITALY - SEPTEMBER 08: Natalie Portman attends the premiere of 'Planetarium' during the 73rd Venice Film Festival at Sala Grande on September 8, 2016 in Venice, Italy. (Photo by Andreas Rentz/Getty Images)
VENICE, ITALY - SEPTEMBER 08: Director Rebecca Zlotowski and actress Natalie Portman, detail, attend the premiere of 'Planetarium' during the 73rd Venice Film Festival at Sala Grande on September 8, 2016 in Venice, Italy. (Photo by Pascal Le Segretain/Getty Images)
VENICE, ITALY - SEPTEMBER 08: Natalie Portman attends the premiere of 'Planetarium' during the 73rd Venice Film Festival a Sala Grande on September 8, 2016 in Venice, Italy. (Photo by Jacopo Raule/FilmMagic)
VENICE, ITALY - SEPTEMBER 08: Lily Rose Depp and Natalie Portman attends the premiere of 'Planetarium' during the 73rd Venice Film Festival a Sala Grande on September 8, 2016 in Venice, Italy. (Photo by Danny Martindale/FilmMagic)
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Portman kept her baby news under wraps earlier this week a the premiere of her film "Jackie" at the festival. Then, she wore a black and white dress with a billowing skirt that kept her bump concealed. But now it appears she's ready for the world to know!

Portman's baby news means she and her husband, choreographer Benjamin Millepied, will officially be a family of four. The duo are already parents to son, Aleph, 5. The happy couple met on the set of her Oscar-winning film "Black Swan" in 2010 and married in 2012. The pair recently moved their family back to Los Angeles after living in Paris where Millepied was the director of the Paris Opera Ballet. Portman joked that Parisians are cooler, but she likes living in California where people seem friendlier.

She's also likely excited to raise her child in Los Angeles as well.

In July, the Oscar winner explained how motherhood has changed the way she works. "I think being a mother made me realize how maternal the role of director is," she said during an interview with the New York Times magazine T. "It made me much calmer under stress because there's that weird parent thing you develop, that when things get really bad, your voice gets calm and your blood pressure slows and you can make everything OK again. And things get bad and stressful easily on films."

Congrats to the happy family!

PHOTOS: See all the stars at the Venice Film Festival

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Stars stun at the 2016 Venice Film Festival
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Stars stun at the 2016 Venice Film Festival
VENICE, ITALY - SEPTEMBER 9: Actress Monica Bellucci attends the premiere of the movie ''On the Milky Road'' during 73rd Venice Film Festival at Venice Lido, Italy on September 9, 2016. (Photo by primo barol/Anadolu Agency/Getty Images)
Actress Lily-Rose Depp attends the red carpet for the movie "Planetarium" at the 73rd Venice Film Festival in Venice, Italy September 8, 2016. REUTERS/Alessandro Bianchi
VENICE, ITALY - SEPTEMBER 08: Natalie Portman attends a premiere for 'Planetarium' during the 73rd Venice Film Festival at Palazzo del Cinema on September 8, 2016 in Venice, Italy. (Photo by Alessandra Benedetti - Corbis/Corbis via Getty Images)
VENICE, ITALY - SEPTEMBER 08: Lily-Rose Depp attends a photocall for 'Planetarium' during the 73rd Venice Film Festival at Palazzo del Casino on September 8, 2016 in Venice, Italy. (Photo by Stefania D'Alessandro/WireImage)
VENICE, ITALY - SEPTEMBER 08: Valeria Kozhevnikova attends the premiere of 'Planetarium' during the 73rd Venice Film Festival at Sala Grande on September 8, 2016 in Venice, Italy. (Photo by Venturelli/WireImage)
VENICE, ITALY - SEPTEMBER 08: Marta Gastini attends a photocall for 'Questi Giorni' during the 73rd Venice Film Festival at Palazzo del Casino on September 8, 2016 in Venice, Italy. (Photo by Pascal Le Segretain/Getty Images)

VENICE, ITALY - SEPTEMBER 07: Natalie Portman attends the premiere of 'Jackie' during the 73rd Venice Film Festival at Sala Grande on September 7, 2016 in Venice, Italy. (Photo by Luca Teuchmann/WireImage)

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Actress Amy Adams attends the red carpet event for the movie "Nocturnal Animals" at the 73rd Venice Film Festival in Venice, Italy September 2, 2016. REUTERS/Alessandro Bianchi

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Emma Stone attends the opening ceremony and premiere of 'La La Land' during the 73rd Venice Film Festival at Palazzo del Casino on August 31, 2016 in Venice, Italy.

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Actress Teresa Palmer attends the red carpet for the movie "Hacksaw Ridge" at the 73rd Venice Film Festival in Venice, Italy September 4, 2016. REUTERS/Alessandro Bianchi

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Actress Naomi Watts attends the red carpet for the movie "The Bleeder" at the 73rd Venice Film Festival in Venice, Italy September 2, 2016. REUTERS/Alessandro Bianchi

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Actress Suki Waterhouse attends the red carpet for the movie "The Bad Batch" at the 73rd Venice Film Festival in Venice, Italy September 6, 2016. REUTERS/Alessandro Bianchi
Actress Dakota Fanning attends the photocall for the movie "Brimstone" at the 73rd Venice Film Festival in Venice, Italy September 3, 2016. REUTERS/Alessandro Bianchi
Actress Ludivine Sagnier attends the photocall for the television miniseries "The Young Pope" at the 73rd Venice Film Festival in Venice, Italy, September 3, 2016. REUTERS/Alessandro Bianchi
Actress Dakota Fanning attends the red carpet for the movie "Brimstone" at the 73rd Venice Film Festival in Venice, Italy, September 3, 2016. REUTERS/Alessandro Bianchi
Actor Jude Law attends the photocall for the television miniseries "The Young Pope" at the 73rd Venice Film Festival in Venice, Italy September 3, 2016. REUTERS/Alessandro Bianchi
Actress Dakota Fanning attends the photocall for the movie "Brimstone" at the 73rd Venice Film Festival in Venice, Italy September 3, 2016. REUTERS/Alessandro Bianchi
VENICE, ITALY - SEPTEMBER 07: Pablo Larrain and Natalie Portman attends a premiere for 'Jackie' during the 73rd Venice Film Festival at Palazzo del Casino on September 7, 2016 in Venice, Italy. (Photo by Alessandra Benedetti - Corbis/Corbis via Getty Images)
Actress Teresa Palmer attends the photocall for the movie "Hacksaw Ridge" at the 73rd Venice Film Festival in Venice, Italy September 4, 2016. REUTERS/Alessandro Bianchi
Director Paolo Sorrentino and his wife Daniela pose as they arrive at the photocall for the television miniseries "The Young Pope" at the 73rd Venice Film Festival in Venice, Italy, September 3, 2016. REUTERS/Alessandro Bianchi
VENICE, ITALY - SEPTEMBER 6: Actress Suki Waterhouse attends a photocall for 'The Bad Batch' during the 73rd Venice Film Festival at Palazzo del Casino on September 6, 2016 in Venice, Italy. (Photo by Primo Barol/Anadolu Agency/Getty Images)
VENICE, ITALY - SEPTEMBER 04: Sistine Stallone and Jennifer Flavin attend the 'Per sempre' Screening and Party Hosted By Twin Set during the 73rd Venice Film Festival at on September 4, 2016 in Venice, Italy. (Photo by Jacopo Raule/Getty Images)
VENICE, ITALY - SEPTEMBER 07: Suki Waterhouse is seen dancing around on the streets of the Lido during the 73rd Venice Film Festival on September 7, 2016 in Venice, Italy. (Photo by Danny Martindale/GC Images)
VENICE, ITALY - SEPTEMBER 06: Actress Hikari Mitsushima attends the premiere of 'Traces Of Sin' during the 73rd Venice Film Festival at Sala Darsena on September 6, 2016 in Venice, Italy. (Photo by Andreas Rentz/Getty Images)
VENICE, ITALY - SEPTEMBER 06: Hikari Mitsushima attends a photocall for 'Traces Of Sin' during the 73rd Venice Film Festival at on September 6, 2016 in Venice, Italy. (Photo by Stefania D'Alessandro/WireImage)
Actress Blu Yoshimi walks the red carpet for the movie "Piuma" at the 73rd Venice Film Festival in Venice, Italy September 5, 2016. REUTERS/Alessandro Bianchi
Actress Teresa Palmer attends the red carpet for the movie "Hacksaw Ridge" at the 73rd Venice Film Festival in Venice, Italy September 4, 2016. REUTERS/Alessandro Bianchi
Actor Andrew Garfield attends the red carpet for the movie "Hacksaw Ridge" at the 73rd Venice Film Festival in Venice, Italy September 4, 2016. REUTERS/Alessandro Bianchi
Actors Vincent Vaughn (L) and Hugo Weaving attend the red carpet for the movie "Hacksaw Ridge" at the 73rd Venice Film Festival in Venice, Italy September 4, 2016. REUTERS/Alessandro Bianchi
Director Mel Gibson attends the red carpet for the movie "Hacksaw Ridge" at the 73rd Venice Film Festival in Venice, Italy September 4, 2016. REUTERS/Alessandro Bianchi
Sophia Stallone, daughter of Sylvester Stallone, attends the red carpet for the movie "Hacksaw Ridge" at the 73rd Venice Film Festival in Venice, Italy, September 4, 2016. REUTERS/Alessandro Bianchi
Actress Ashley Greene attends the red carpet for the movie "In Dubious Battle" at the 73rd Venice Film Festival in Venice, Italy, September 3, 2016. REUTERS/Alessandro Bianchi
Dayane Mello attends the photocall for the television miniseries "The Young Pope" at the 73rd Venice Film Festival in Venice, Italy September 3, 2016. REUTERS/Alessandro BianchiTEMPLATE OUT
Actress Emilia Jones attends the red carpet for the movie "Brimstone" at the 73rd Venice Film Festival in Venice, Italy September 3, 2016. REUTERS/Alessandro Bianchi
Actress Cecile de France attends the photocall for the television miniseries "The Young Pope" at the 73rd Venice Film Festival in Venice, Italy September 3, 2016. REUTERS/Alessandro Bianchi
Actor Jude Law attends the photocall for the movie "The Young Pope" at the 73rd Venice Film Festival in Venice, Italy September 3, 2016. REUTERS/Alessandro Bianchi
Actresses Cecile de France (R) and Ludivine Sagnier (L) attend the photocall for the movie "The Young Pope" at the 73rd Venice Film Festival in Venice, Italy September 3, 2016. REUTERS/Alessandro Bianchi
Model Hofit Golan attends the red carpet event for the movie "Nocturnal Animals" at the 73rd Venice Film Festival in Venice, Italy September 2, 2016. REUTERS/Alessandro Bianchi
Actor Colin Firth (R) and his wife Livia (L) attend the red carpet for the movie "Franca: Chaos and Creation" at the 73rd Venice Film Festival in Venice, Italy September 2, 2016. REUTERS/Alessandro Bianchi
Actors Live Schreiber (L), Naomi Watts (C) and director Philippe Falardeau (R) attend the red carpet for the movie "The Bleeder" at the 73rd Venice Film Festival in Venice, Italy September 2, 2016. REUTERS/Alessandro Bianchi
Actor Liev Schreiber attends the red carpet for the movie "The Bleeder" at the 73rd Venice Film Festival in Venice, Italy September 2, 2016. REUTERS/Alessandro Bianchi
VENICE, ITALY - SEPTEMBER 07: Suki Waterhouse is seen during The 73rd Venice Film Festival on September 7, 2016 in Venice, Italy. (Photo by Jacopo Raule/GC Images)
VENICE, ITALY - SEPTEMBER 08: Natalie Portman attends a photocall for 'Planetarium' during the 73rd Venice Film Festival at Palazzo del Casino on September 8, 2016 in Venice, Italy. (Photo by Stefania D'Alessandro/WireImage)
VENICE, ITALY - SEPTEMBER 08: Emmanuel Salinger attends a photocall for 'Planetarium' during the 73rd Venice Film Festival at Palazzo del Casino on September 8, 2016 in Venice, Italy. (Photo by Stefania D'Alessandro/WireImage)
VENICE, ITALY - SEPTEMBER 09: Actress Julia Roy attends the premiere of 'Never Ever' during the 73rd Venice Film Festival at Sala Grande on September 9, 2016 in Venice, Italy. (Photo by Ian Gavan/Getty Images)
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