Jordan Strauss / Invision/AP 1 / 20
Jordan Strauss / Invision/AP 1 / 20

Ashley Greene admits nobody's better at scaring her than, well, Ashley Greene.

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"When I was younger, I watched a lot of horror films," she says. "And then at a certain point I hit an age where I kind of realized 'Oh, wait -- people can probably watch this and duplicate it; or this could be real.' That's when it got scary to me, that all of this could actually happen. I know it is a movie, but there are people out there."

Even if those people are just characters in movies.

"I had this weird thing about showering at night by myself because I had, obviously, seen 'Psycho' and one night my parents weren't home, and I had to," she recalls. "And the power went out -- that one time! I was terrified. I literally climbed out the window and went to my neighbor's house. I was so terrified, and we lived on the water and the back of my house was glass. There were all these long hallways. I mean, it was literally terrifying."

Greene says she's been generally more scared by psycho killer scenarios than supernatural forces -- she'd rather remain in denial of phantasmagorical possibilities. "I would prefer to not believe in ghosts," she says. "Actually, the building that I live in, they say, is haunted, which is great. It's an historical building. … The whole reason that I prefer not to believe in ghosts is because it's a scary thing. You can't call the cops and say, 'Oh, there's a ghost.' No one can really help you and there's not really much of a defense against it."

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If you can't tell, Greene has been spending a lot of time thinking -- and talking -- about what scares her. The actress, known for her stint in the vampire genre in "Twilight" stars in her first psychological horror film, "The Apparition," in theaters on Aug. 24.

One genuinely scary thing facing Greene right now is life without "Twilight." The Nov. 16 release of "Breaking Dawn -- Part Two" is the final installment of the blockbuster franchise.

"Comic-Con was when I was like, 'Oh, wait,'" she says. "That was the first event that was the last event that we were going to do for 'Twilight,' and I was like, 'Wow -- It's crazy.' It has been such a huge part of my life and my career. It basically started my career. You do get comfortable and you do become a family with these people, so it's a little weird knowing that we're not going to go back to that."

But she won't let that haunt her, either. "I like to be positive," says Greene. "I think it's afforded me a lot of opportunities and so I feel like I just want to keep moving forward and kind of jump at those rather than being that sad about the past."

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