Who's the Toughest 'G.I. Joe' Cast Member?

Who's the Toughest 'G.I. Joe' Cast Member?

Prior to G.I. Joe: Retaliation becoming the No. 1 movie in America, ET's Brooke Anderson caught up with the stars at the world premiere in Hollywood on Thursday.

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Before the night began, star Dwayne "The Rock" Johnson met wounded military servicemen Mike Green and Norbie Lara backstage at Jimmy Kimmel Live, and they were both thrilled to attend their first Hollywood premiere.

"It's my lucky day," Johnson said, calling it a privilege and an honor to be able to spend time with two American heroes. "Thank you, of course, for your services and all that you have done ... I have a lot of love for the men and women of our military."

When it came down to playing G.I. Joes on screen, there was some disagreement about who was the toughest on set.

"The Rock," Bruce Willis answered without hesitation. "He makes everybody look good."

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"There's no one like Bruce. Don't let him fool you," Johnson argued. "He's being humble, saying I'm tough. He's the guy. He's the godfather of saving the world and the king of action so it was awesome to work with him."

At the end of the night, ET special correspondent Shawn Afradi got the stars to reveal their favorite action stars. Watch the clip to see who they picked.

G.I. Joe: Retaliation is in theaters now.