Emma Watson is part of one terrifying Harry Potter reunion. The actress, who played Hermione Granger for years, is appearing in the upcoming thriller Regression opposite David Thewlis, who played Remus Lupin in five Harry Potter movies.

A new trailer for the flick made its way online on Wednesday, June 10, showing Watson and Thewlis on the big screen together for the first time since Harry Potter and the Deathly Hallows – Part 2 hit theaters in 2011. 

Watson, 25, stars in the Alejandro Amenábar-helmed movie as a young woman named Angela Gray. Angela goes to the local Minnesota police to accuse her father, John Gray (David Dencik), of sexual abuse. Thewlis, 52, makes his entrance as a psychologist named Dr. Kenneth Raines, who treats John. Ethan Hawke is also featured in Regression as a detective named Bruce Kenner, who is working on the case.

The spooky teaser opens with the father making a confession to Detective Kenner, saying simply of the accusations, "I did it." While John makes the confession, he cannot remember the acts, and Dr. Raines is brought in to attempt to change that.

"He's repressed them," Thewlis says as Raines. "The memories are obviously in there behind some door. It's not that difficult to find a key and free them, provoke a regression." 

The horrifying details of the events are then spelled out by Angela, who paints a picture of a satanic ritual involving multiple people and demonic figures. Detective Kenner begins to put himself in danger as he digs deeper and deeper into the case.

Check out the latest look at Regression in the video above!