Paul Rudd was starstruck on 'Captain America' set

Actor Paul Rudd was starstruck while filming 'Captain America: Civil War' opposite Robert Downey Jr and Chris Evans. Rudd, 47, reprises his role as thief-turned-Ant-Man hero

Scott Lang

in the third installment of the Captain America trilogy, and told

The Graham Norton Show

that he felt like a 10-year-old boy while on set, reported Contactmusic.

Paul Rudd wants to be Lego man
"We shot Ant-Man - but I was alone in a bubble. And all of a sudden I'm standing around seeing

Robert Downey Jr

in the Iron Man suit, and seeing Chris Evans," Rudd said. "And they're all there. I've seen the movies. I felt like I was 10 years old. It was crazy. It was pretty cool.

WATCH: Paul Rudd on Ant-Man's Allegiance to Captain America