More than "The Hills" may be ending for two of its stars -- Heidi Montag has filed for separation from Spencer Pratt. She cited irreconcilable differences in a court document submitted Tuesday in Santa Monica, Calif.
Montag and Pratt are stars of the MTV series "The Hills" and have been married since last April. The series is in its final season.
Montag's two-page handwritten filing does not offer any more details on the couple's breakup. An e-mail sent to an MTV spokeswoman seeking comment was not immediately returned.
The filing also doesn't indicate whether Montag intends to file for divorce, which would formally end their marriage.
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