According to an article in vanity fairTo film that one scene, Chastain had to be completely covered in about 4,500 gallons of fake blood while she clung to life and hopped in and out of the red pool. While this is a staggering amount, it pales in comparison to the allegedly 50,000 gallons used for the final scene of Believe Alvarez‘s “Evil Dead” reboot that has blood raining down from the sky. But it’s not like Chastain felt a difference — she was still squirting around in a ton of blood.
In the Vanity Fair piece, Chastain opened up about her hellish experiences acting out the scene while swimming in the red stuff. “It was really gross,” she said. “It’s like mucus and it was in my nose, in my ears and stuck to my eyeballs. I was a little scared, but I was happy to do it.”
No one can blame her for getting upset. To reach the film’s climax, Chastain had to be dipped in fake blood for hours, even when the cameras weren’t rolling, without getting a chance to clean himself. “I admit that was the only miserable part,” she said:
“Andy dressed me in blood for the whole end of the movie. Before each take, they had a small children’s pool filled with cold blood, and [they’d] pour it on me.”
For what it’s worth, Chastain took home an Oscar for best actress earlier this year. We like to think that it was really about enduring that scene.