EXCLUSIVE: 'Captain America: Civil War' Stars Robert Downey Jr. and Don Cheadle Have the Best Bromance Ever

ET went behind the scenes of Captain America: Civil War for a closer look at the on-screen stunts and off-screen shenanigans.

ET went behind the scenes of the highly anticipated Marvel action movie, Captain America: Civil War, for a closer look at the on-screen stunts and off-screen shenanigans.

In the flick, Robert Downey Jr. and Don Cheadle reprise their roles as Iron Man and War Machine, respectively, and after three movies together, the bond between the two actors is stronger than ever. What's more, their sense of humor was on full display when ET's Nichelle Turner asked about some fake bruises on Downey Jr.'s face.

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"I spoke about something having to do with Civil War that I wasn't supposed to and Don touched me up," Downey Jr. joked.

"Hey man, I do what Marvel tells me to," Cheadle teased.

Meanwhile, Downey Jr. pointed out that Cheadle didn't have a scratch on him.

"No, I'm looking good," Cheadle said.

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In the movie, a rift forms between Iron Man and Captain America (Chris Evans) due to political pressure to install a system of accountability for the Avengers. While the film is about a fracture inside the superhero group, there's only one relationship that Downey Jr. needs to remain intact.

"As long as we're not against each other, I don't care what happens," Downey Jr. said, gesturing to Cheadle.

For Scarlett Johansson's character, Black Widow, she could have aligned with either side of the civil war.

"You are good friends with Iron Man and you're good friends with Captain America. How do you pick?" Turner asked Johansson.

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"I just flip a coin," Johansson said with a laugh.

Captain America: Civil War opens May 6.