Exclusive: 'Hunger Games' Star Haunts 'The Quiet Ones' Trailer

Sam Claflin and Jared Harris star in the new Hammer horror movie about a haunting in England.

Who here believes in ghosts? Anyone?

Perhaps you'll start to believe after sitting through our exclusive trailer for "The Quiet Ones," the new Hammer horror film directed by John Pogue and starring "The Hunger Games" veteran Sam Claflin, "Sherlock Holmes: A Game of Shadows" villain Jared Harris, and more.

The film takes place in the 1970s, and follows an Oxford scholar named Professor Coupland (Harris) and his pupil Brian McNeil (Claflin) as they document their attempts to rid a test subject of disease — although from another angle, it would appear she's possessed. The experiment eventually takes the team to an isolated house in the countryside, where all sorts of horrible things begin to occur.

The trailer is narrated by the haunting voice of a little girl, who recites the following ominous words:

Through the eyes, there's a door

Uninvited they come in

And the quiet they pray

For the soul has worn thin

There's those who are young

Those who are weak

They inhabit, possess

They slither and roar

On this night, the Quiet Ones

Will be quiet no more

If the final film is even half as harrowing as the trailer, then we're all destined for some sleepless nights.

"The Quiet Ones" hits theaters on April 25.