Natalie Portman got a little verklempt about her husband-to-be on Saturday.

Accepting the Desert Palm Achievement Award at the Palm Springs International Film Festival, the tight-lipped pregnant star couldn't help gushing about Benjamin Millepied, the dancer/choreographer whom she met while making Black Swan.

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As Frenchman Millepied, 33, looked on from the audience, Portman, 29, got teary-eyed as she thanked her fiance who "partnered me in the movie and who now partners me in life."

About three months along with Millepied's child, Portman concealed her baby bump with a Vionnet dress and proudly wore her stunning engagement ring -- revealed the first pics on Friday -- as she accepted her trophy.

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A source tells the new Us Weekly that "it was seductive to watch" Portman and Millepied (who plays a male ballet dancer in Black Swan) fall in love on the film's set. "There was no way the attraction could be missed," the insider adds.

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"She likes artsy, smart guys and he's an artsy, smart guy," another pal notes of Millepied, one of the youngest choreographers at the prestigious New York City Ballet.

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