Alyson Hannigan — A Mental Patient Is Threatening to Kill Me

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American Pie” star Alyson Hannigan has obtained a restraining order against a man she claims is mentally unstable and threatened to kill her, our sources has learned.

The “How I Met Your Mother” actress filed a request for a restraining order in L.A. County Superior Court, claiming John Hobbs has been harassing her on the Internet — posting threatening messages on Facebook, MySpace, and Alyson”s website.

Hannigan says Hobbs is “mentally unstable and was recently discharged from a mental hospital.”

In addition to herself, Alyson got protection for her husband and two kids.

A hearing has been set for March 6th … when a judge will decide whether to make the restraining order permanent.