Who is being a vampire now? Jennie Garth plans to get  revenge on ex-husband  Peter Facinelli by ripping him apart in a tell-all book The National Enquirer is reporting and she is “out for blood.”

The 90210 beauty will bare intimate and embarrassing secrets in her upcoming memoir, “Deep Thoughts from a Hollywood Blonde.”

“Jennie is out for blood,” disclosed an insider.

“She’s telling friends that she’s going to reveal the real story of why her marriage failed , and that Peter is not going to come out looking good.”

The couple married in 2001, and split in 2012, amid rumors that “The Twilight Saga actor had cheated on Jennie.

“Peter begged Jennie to leave out any references that made him look like a cad or painted him in a bad light,” divulged the source.

“But Jennie told him that he should have thought about that when he was running around on her.”

For more exclusive details about Jennie’s tell-all book pick up the latest issue of The National Enquirer on newsstands Friday.