Michael LohanLindsay Lohan's father Michael Lohan is back behind bars after calling his ex-girlfriend Erin Muller, TMZ reports.

Earlier this year, Muller received a restraining order against Lohan due to an April incident where he was sent to jail for threatening to kill her.

Part of the order of protection prohibits the Hollywood dad from "trying to communicate by phone." However, Lohan himself denies he was ever arrested.