Actress Olivia Munn was so freaked out by her new horror movie Deliver Us From Evil, she has turned her home into a fortress against demonic forces.

The Newsroom star isn't taking any chances after watching an early screener of the new film, based on the real-life experiences of a New York police officer - and she has filled her house with good luck charms and things to ward off evil spirits.

She tells Wenn, "I literally brought more crucifixes into the house because that's what wards off the bad spirits. We have sage and we have crosses in my house. They are everywhere! I did bring them into my house in a bigger way than I had before."

And Munn reveals she knew her new film was terrifying when she took a friend to the screener.

She adds, "I took my best guy friend to an early screening and after we got into the car. He was driving and he popped a Xanax (anti-anxiety pill) and he looked at me and said, 'I love you and support everything you do but I will never see this movie again!' That's a good scary movie."