In Netflix's upcoming movie "The Good Nurse," Jessica Chastain stars as Amy Loughren, a nurse who figures out that her coworker Charles Cullen (Eddie Redmayne), is actually a serial killer who uses his medical knowledge to murder patients. The film is based on Charles Graeber's 2013 nonfiction book "The Good Nurse: A True Story of Medicine, Madness, and Murder" and directed by Tobias Lindholm.

As documented in the book, Cullen ultimately confessed to killing up to 40 patients, but investigators have estimated that he could have 400 victims in total. Cullen was a nurse for 16 years at nine different hospitals, and he killed his patients by giving them lethal doses of insulin and other drugs.

Chastain told Vanity Fair that she was attracted to the movie because it's not like other true-crime media. The focus isn't as much on Cullen's crime, but on Loughren's quest to unmask him and end his spree.

"I wanted to acknowledge someone like Amy," Chastain told the outlet. "She's the kind of superhero that I want to celebrate, because they're everywhere."

To prepare for their roles, Chastain and Redmayne told Vanity Fair, they went to "nursing school" and studied video of the real people they were portraying. Redmayne also worked with a movement coach to figure out Cullen's physicality. Chastain said of her costar, "There's a thing he does at a table where his fingers clutch the top of a desk almost like a spider — it's exactly something from interviews [with Cullen]. What he does in this movie is astounding."

"The Good Nurse" will be released on Netflix later this year. Read on for everything we know about the film.

by Sara Youngblood Gregory 11 hours ago

by Perri Konecky 12 hours ago

by Njera Perkins 13 hours ago

by Njera Perkins 13 hours ago

by Melanie Whyte 1 day ago

by Njera Perkins 1 day ago

by Victoria Edel 1 day ago

by Kelsey Garcia 1 day ago

Get the Daily Inside Scoop

Select the topics that interest you:

By signing up, I agree to the Terms and Privacy Policy and to receive emails from POPSUGAR.

Get the daily inside scoop right in your inbox.

Sign up for our Celebrity & Entertainment newsletter.

By signing up, I agree to the Terms and Privacy Policy and to receive emails from POPSUGAR.

Please select the topics you're interested in:

Would you like to turn on POPSUGAR desktop notifications to get breaking news ASAP?

Great, Click the ‘Allow’ Button Above ☝️

Awesome, You’re All Set! 🎉