There's nothing like a good horror movie that can keep you on the edge of your seat from start to finish. The movie might be so good, in fact, that perhaps you begin to question whether what you see on screen is truly just a movie. We love the rush, the thrill, the fear, and excitement we experience as soon as the lights go down and the camera starts to roll inside of the movie theatre. 

Well, get ready folks. John Pogue's horror film, "The Quiet Ones" aims to have you clenching to your seats, so buckle up and enjoy.

As the movie approaches its April 25 release in the U.S., I had the wonderful pleasure of speaking with "The Quiet Ones" actors Jared Harris and Olivia Cooke, who just recently premiered the movie in the U.K. on April 10.

Harris plays the antagonist Dr. Joseph Coupland, who embarks on a scientific experiment to determine whether the supernatural is in fact real, or whether it is a manifestation of the thoughts inside one's mind. The subject of Coupland's experiment is Olivia Cooke's character, Jane Harper. Harper is a depressed young woman with a dark past. As Coupland and his students use Harper for testing, a series of frightening occurrences begin to take place that cause the experiment to take an alarming turn.

"The Quiet Ones" is loosely based off of a 1970s' Canadian experiment that sought to prove the same theory. During our interview, Harris described the '70s theory as "the match that sparked 'The Quiet Ones' writers' imaginations." Harris also assured me that the movie is meant to entertain and is "not meant to be a documentary."

In the '70s experiment, the doctor was Alan Robert George, who created a group of eight people known as the Toronto Society for Psychical Research. The experiments conducted by the group became known as the "Philip Experiments."

Here's what Olivia Cooke and Jared Harris had to say about the movie, it's history, and their characters.

So you're fresh off the U.K. release of your film, "The Quiet Ones." How was the U.K. premiere? Are you excited for the U.S. premiere?

Jared: I'm looking forward to it immensely. The movie's reception has been fantastic, which is amazing given that it was a small movie made with a lot of sweat, love, commitment, yelling, and screaming during the scenes. So it's really exciting when you see something like that get this tremendous push and generate all this interest. It's what you hope for every movie that you do that's made on this level. You hope that it will get this kind of momentum and get this attention and love.

What was the audition process like for the movie? What sparked your interest in playing these particular characters?

Olivia: I was interested in the many layers of Jane Harper. Jane is really debilitated by what she thinks is inside of her. She can't be out in the real world because strange things happen to her. Because she's been isolated, she's unable to grow up as a normal teenager. She appears to maybe be possessed by a demonic spirit in the movie but at the same time she's this sort of teenage vixen who's coming into her womanhood and learning about her sexuality. As far as the audition process; it's funny actually because they didn't want to see me at first. They thought that I was too young. The role had originally gone to another girl but then she dropped out so eventually they agreed to see me. Then I read a couple of times for John Pogue and the producers. The third round they paired me up with my co-star, Sam, and it just worked. I think I scared the living daylights out of them.

Jared: Joseph Coupland is a really juicy character. Specifically, his journey with the audience takes a lot of different twists and turns in terms of what the audience feels about his character. You get to have quite a rich experience with the audience when you get characters like that. Joseph is the antagonist in the story but the construction of the story eventually allows Joseph to become humanized by the end. He's this scientist who becomes obsessed with his subject, Jane Harper. He pushes the experiment beyond the limit. The audience is able to develop this complex relationship with his character in which they become attached to him even though he is obviously the bad guy.

So I'm always curious to know what it's like filming a scary movie. Were there any weird things that happened on set? What was your favorite scene to shoot?

Olivia: Apart from the house being really creepy, it gets crazy because you're heightening things to a point where the director is telling you to go further and further with it and you end up doing this huge performance and going to such extremes that when you're finished you can't help but laugh about it and make fun of each other a bit. It was actually more enjoyable than scary. We had a blast together. As far as my favorite scene; it's definitely the scene where everyone gets branded. In that scene we had to go all out and whenever someone thought they were giving a 10 out of 10 performance, it only ended up being a 5 and they had to keep going much further. We all loved watching Jared's performance in that scene and his reaction to what was going on.

Jared: Doing a movie like this requires you to push yourself a lot further than you might think is appropriate. Your idea of giving a 10 performance in a movie like this often times has the director telling you that you were actually performing at a 5. It's stressful, it's exhausting, it's challenging, and there's always a sense of great relief when the director says cut because you need to have a joke and a laugh and go somewhere else before you go back into another take. My favorite scene is the branding scene as well. It was a lot of fun. That scene is basically where the film reaches its arch and there was a sense of nervousness on set before taping the scene because of the challenges with going above and beyond in a scary movie. So with that scene we just went for it and left all our inhibitions behind and it actually turned out to be a lot of fun and very liberating.

The movie "The Quiet Ones" is based on the idea that a ghost is a manmade creation and that it's all in the mind. Do you believe that idea or are you a believer in actual ghosts?

Jared: I don't know whether I believe or not, honestly. I think that's just as credible an answer as saying there are ghosts. But what interested me in the story is that it starts from a place of skepticism and Coupland puts forward this proposition which seems very credible and the audience is able to question and figure out where the supernatural occurrences are coming from. It's exciting and scary and terrifying at the same time.

Olivia: I'm on the fence. I know people that have had weird things happen to them and I'm willing to let ghosts come and haunt me for a bit if it actually exists. But it's just never happened so I don't know. Until it actually happens for me or until I can actually see something that I know 100 percent is a ghost, I'm gonna be 50/50 for now.

What are some of your favorite scary movies?

Jared: Oh, I've got loads of them. "Night of The Demon"; "The Others"; "Jaws"; "The Shining"; "The Exorcist." They're all good and they're good for a reason. I mean, it look me a couple of years before I was able to get back in the water after I saw Jaws.

Olivia: I actually really loved the first "Paranormal Activity." It scared the living daylights out of me. I thought it was real. I also loved Insidious. I liked that soft theatrical take to the movie and I think that "The Quiet Ones" has a similar theatrical feel as Insidious but explores more of the psychology of the main character.

What upcoming projects can we look forward to seeing you in?

Jared: I will be in a movie called "The Boxtrolls," which is an animated movie from the people who made Coraline and Paranorman. I will also be in "The Man from U.N.C.L.E," which is a Guy Ritchie movie based on the television series about two secret agents. I also have Poltergeist coming out next year.

Olivia: I start filming a comedy called "Me and Earl and the Dying Girl." I play Rachel, the dying girl. I also star in "The Signal," which is a sci-fi directed by William Eubank and also stars Laurence Fisburne. Also look out for "Ouija," which comes out in October and then I go back to filming "Bates Motel" in October as well.

Mark your calendars, "The Quiet Ones" comes out on April 25. Check out the trailer below. Will you be watching?