Lionsgate has released a series of three motion posters for The Quiet Ones, featuring Jared Harris as Professor Coupland, Sam Claflin as Brian O'Neil and Olivia Cooke as Jane Harper. The story, inspired by true events, centers on a university professor (Jared Harris) who tries to create a poltergeist by using negative human energy, with the help of his students Brian and Jane. John Pogue directs this haunting thriller, co-starring Erin Richards, Laurie Calvert and Max Pirkis, arriving in theaters April 25.