Julianne Moore has joined the cast of James McAvoy's upcoming thriller Control.

Directed by Robert Schwentke (Flightplan) for StudioCanal and The Picture Company, Control is based on the Zack Akers and Skip Bronkie podcast Shipworm and finds Glass actor McAvoy in the role of a troubled doctor who awakens one morning with a mysterious voice in his head making severe demands.

Deadline broke the news of Moore's involvement, with production set to begin this month. Details about Moore's role have not yet been revealed, but she will reportedly play a "pivotal character".

julianne moore oscars red carpet
Getty Images

Related: Natalie Portman explains building sexual tension with Julianne Moore in May December

Best recognised for her performances in Boogie Nights, The Hunger Games and Still Alice, Moore's recent work on the big screen includes May December opposite fellow Oscar-winner Natalie Portman.

For the movie, she applied a lisp to her character Gracie Atherton-Yoo - a woman imprisoned for having sex with a 13-year-old before later marrying him and raising three kids together - which wasn't in the original script written by Samy Burch.

Apparently, this creative decision was made to aid Portman, who played an actor preparing to bring Gracie to life in an independent movie.

julianne moore and natalie portman, may december
Rocket Science/ Francois Duhamel//Sky

Related: First trailer lands for James McAvoy's horror remake

Speaking to W Magazine about her approach, Moore revealed: "That vocal choice was not in the script. I made the decision based on two things: I wanted to give Natalie’s character some things she could copy. I hit upon this idea of Gracie's lisp, which is something we attribute to children. That's the second reason: Gracie is childlike."

On the screenplay itself, her first thoughts were: "It feels very direct. And as we go into it, I think with each of the scenes that we played it has this incredible room for emotion and for the things that people don't say.

"The strange kind of muscularity, with what it could hold in terms of its tremendous amount of feeling."

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Dan Seddon

Reporter, Digital Spy 

Dan is a freelance entertainment journalist. Beginning his writing career in 2014, Dan's work first graced the pages of cult publications Starburst magazine and Little White Lies before moving onto Total Film, Digital Spy, NME and Yahoo Entertainment

In the film and TV universe, he kneels at the altar of Jim Carrey, Daniel Plainview, Mike Ehrmantraut and Paulie Walnuts.