Actress Leelee Sobieski is celebrating after discovering she's expecting her first child with fiancé Adam Kimmel.

The Joan of Arc star accepted her fashion designer beau's proposal in June, and the pair has been quick to cement its relationship with an extra addition to its family.

A rep for the Never Been Kissed actress confirms, "The happy couple is thrilled to be expecting in December."

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(This news article provided by World Entertainment News Network)