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OTRC: Natalie Portman's baby 'dances' during Oscars

Natalie Portman's Oscar win for Best Leading Actress at the 2011 Academy Awards wasn't the only thing that rocked her night.

"The baby was definitely kicking a lot during the song portion of the show," the 29-year-old actress told reporters backstage. "Little dancer."

Portman is expecting her first child with "Black Swan" co-star and fiance Benjamin Millepied. She said she does not know its gender.

"I mean ... one of the most exciting things about being pregnant is that I just I'm accepting the complete unknown, it's a complete mystery and miracle," Portman added. "And, yeah, it's really just accepting that I have no idea, which is what all of us live every day."

Portman showed off her baby bump in an off-shoulder, plum-colored Rodarte gown on the Oscars red carpet (see photos of Portman and other celebrities) and a video of Portman) before the show.

Portman won her award for her role in "Black Swan," which saw her playing a troubled ballerina. This is the actress' first win and second Oscar nomination.

Portman beat Nicole Kidman of "Rabbit Hole," Jennifer Lawrence of "Winter's Bone," Annette Bening of "The Kids Are All Right" and Michelle Williams of "Blue Valentine."

The movie is set to be released on DVD and Blu-ray on March 29.

"Black Swan" was nominated for five Oscars, including Best Picture, but Portman's win marked the only one for the movie. The actress also received an Oscar nomination for her part in the 2004 movie "Closer."

Portman told OnTheRedCarpet.com in late 2010 that her parents were supportive of her role in "Black Swan," which sees her sharing a sex scene with Kunis, but that some parts were tough for her mother to watch.

The actress has also said that starring in the film fulfilled her childhood dream of becoming a dancer. Both she and Kunis lost about 20 pounds for their roles.

Portman recently starred in the sex comedy movie "No Strings Attached" with Ashton Kutcher, which she has joked may have made her father happy, and appears in the upcoming fantasy comedy movie "Your Highness" alongside Academy Awards co-host James Franco.

The film features a slew of sexual jokes and a scene that sees Portman in a thong bikini.

Portman plays a warrior who helps a pair of princes, played by Franco and Danny McBride of the HBO series "Eastbound & Down," save a maiden, played by Zooey Deschanel, from an evil wizard, portrayed by Justin Theroux.

The director of "Your Highness," set for release in April 2011, is David Gordon Green, who directed Franco and McBride in "Pineapple Express."

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