But first, the two gave a little preview of the film, which features the former Avengers teammates going to battle against each other.
The two didn't don their Captain America and Iron Man suits for the showdown, however. Instead, they let their thumbs do the talking.
"Let's end this, once and for all," Evans challenged, as the two broke out customized character caps for a thumb wrestling battle.
The duel ultimately ended in a draw, which means that fans will have to wait for Civil War's May 6 release to find out who really wins the superhero showdown. We did, however, get to see some never-before-seen footage in the preview that aired during the Nickelodeon award show.