Lindsay Lohan To Take Out an Order of Protection Against Father -- Report

LINDSAY Lohan is so scared of her father, Michael, she's taking out an order of protection against him, according to reports.

The Mean Girls actress, 22, recently said Michael "needs to be on medication" after he launched yet another scathing attack on her girlfriend, Samantha Ronson.

And Lindsay is now taking measures to keep her dad at bay.

A source tells the New York Post newspaper, "Lindsay is taking out an order of protection. He's behaving so erratically that she's terrified he'll do something to her. She's contacted her lawyer to arrange this."

Lindsay's sister, Ali, "already has an order of protection against him, as does [mom] Dina. No one is speaking with him until he gets help."

Lindsay's rep declined to comment.