Jessica Chastain had to go to the hospital after suffering head injury while filming 'The 355'

Actress Jessica Chastain appeared on The Late Late Show With James Corden Wednesday night, where she revealed the scary head injury she suffered while filming her new spy action film, The 355.

During the interview, Chastain, who also serves as producer on the film, shared that she personally called each actress to ask them to be in the film, and was instrumental in raising the money to make the movie. "We made it for a fraction of the cost of what it would normally be and we are the owners of the film," shared Chastain. A smaller budget apparently meant Chastain would have to do some of her own stunt work, which impressed host James Corden, who told the actress, "You must have gotten injured. Some of the stuff you're doing in the film is sort of ridiculous." That's when Chastain admitted that she "actually had to go to the hospital."

"That day I was really worried," said Chastain's co-star Cruz.

Chastain explained, "I was doing a fight scene and it was on a marble floor. I misjudged. I had fallen and hit my head. I misjudged the distance. I heard a crack. That might be why I am the way I am today." However, while Chastain may joke about the accident now, at the time, it was pretty terrifying for everyone.

"I hear a crack. Everyone stopped and looked scared, and I was a bit stunned, like, I don't know what is happening," said Chastain. "My stunt double comes up to me, she is French and doesn't speak a lot of English, she just comes up to me and she goes, 'I'm sorry, but I have to put it back in.' And I'm sitting there, I'm like, 'Put what back in? Are my brains outside of my face? What is happening?' And I guess it was just a bruise she was pushing back in my head. I did a couple more takes because, you know, I don't give up easy, and then I went to the hospital."

While it wasn't the only pain the actress sustained on-set, as she shared earlier in the day on Ellen a different stunt that caused her to make a genuine pain face that actually made it into the film, this injury did warrant a trip to the hospital, but only because Cruz made her.

Cruz shared, "We convinced you to go to the hospital, because she didn't want to go. She wanted to keep going. I was like, 'You're going to the hospital!'"

Video Transcript

JAMES CORDEN: You must have got injured. Some of the stuff you are doing in the film was ridiculous.

JESSICA CHASTAIN: I actually had to go to the hospital.

JAMES CORDEN: No, why?

PENELOPE CRUZ: You did.

JESSICA CHASTAIN: Yes.

PENELOPE CRUZ: That day, I was really worried.

KYLIE MAR: On The Late Late Show with James Corden Wednesday night, actress Jessica Chastain revealed the scary head injury she suffered while filming her new spy action film "The 355."

JESSICA CHASTAIN: I was doing a fight scene and it was on a marble floor. I had to fall and hit my head. I misjudged the distance. I heard a crack.

JAMES CORDEN: No.

JESSICA CHASTAIN: Yeah, that might be why I'm the way I am today. I heard a crack.

KYLIE MAR: Chastain may be joking about the accident now, but at the time, it was pretty terrifying for everyone.

JESSICA CHASTAIN: Everyone stopped and like looked scared, and I was a bit stunned. Like, I don't know what's happening. My stunt double comes up to me and-- bless her, she's so sweet. She was French. She is French and doesn't speak a lot of English, and she just comes up to me. And she goes, I'm sorry, but I have to put it back in, like that.

KYLIE MAR: Chastain went on to share that at that moment, she thought her brains were outside of her face. And while it wasn't the only pain the actress sustained on set, as she shared earlier in the day on Ellen, a different stunt that caused her to make a genuine pain face that made it into the film. This injury did warrant a trip to the hospital.

JESSICA CHASTAIN: And I guess it was just a bruise she was pushing back in my head. I did a couple more takes because I don't give up easy. And then, I went to the hospital.

PENELOPE CRUZ: Because we convinced you to go to the hospital because she didn't want to go. She wanted to keep going.

[INTERPOSING VOICES]

PENELOPE CRUZ: And I was like, you're going through the hospital.