Hills star Heidi Pratt has been rushed to a Costa Rican hospital with an undisclosed medical emergency, Usmagazine.com has learned exclusively.

Pratt's husband, Spencer -- who is competing with his wife on NBC's I'm a Celebrity...Get Me Out of Here -- is traveling with her to the hospital, a source in Costa Rica confirms.

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No further details have been made available as to the specifics of Heidi's condition or what it means for the series.

NBC could not be reached for comment.

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