The Black Swan star and fiancé Benjamin Millepied will welcome their first child together in 2011

Natalie Portman and choreographer Benjamin Millepied are engaged and expecting their first child, her reps confirm to PEOPLE exclusively.

The couple met during the production of Black Swan. Portman’s performance in the film has earned her nominations for a Golden Globe and Screen Actors Guild Award.

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The actress, 29, will next be seen in the romantic comedy, No Strings Attached, costarring Ashton Kutcher.