'Captain America 3' Spoilers, Cast & Release Date: What Will Crossbones Do in 'Civil War?'

'Captain America: Civil War'
'Captain America: Civil War' hits theaters on May 6, 2016. |

Frank Grillo will be appearing in the star-studded Marvel film "Captain America: Civil War" as the super villain Crossbones, and the actor is now dishing about his new role and how thrilled he was to be portraying Captain America's opponent.

During an interview with Collider, Grillo revealed that he "felt like a little boy" when he first put on his Crossbones costume, and his excitement even translated to the filming.

"It's just what you would imagine it to be," he said about filming. "That's what we are. Me and (Chris) Evans were doing this scene for days, where we were supposed to be in a certain part of the world and they recreated that world. There were hundreds of extras, and there we were in the center of it."

And it wasn't just the extras who were curious about their major fight scene. "(Robert) Downey wanted to come down and watch us do the scene. So, at one point, I turn around and Downey is there and (Jeremy) Renner was there and Paul Rudd had just come down, and they were all watching us do our thing. I was like, 'Wow, this is special! This is really cool!'" added Grillo.

It was a lengthy process for the actor to get his Crossbones costume right, since he had to undergo several fittings. "There were seven different fittings. I was doing another movie, and they flew out. It was top secret. They came in with briefcases and I was like, 'Really?! For a helmet?!' And then, when I went in my trailer and saw it and put it on, it changed my whole DNA. It's amazing!" he gushed.

However, Grillo admitted that even though his character is pretty cool and it has been a blast filming "Captain America: Civil War," the movie will not really delve into the backstory of Crossbones' alter-ego Brock Rumlow, since there are so many characters in the film and each need their time in the sun.

"This movie is such a big movie with a lot of people in it, so you don't get as much of the time that you'd like to have. But, it's all good. We'll see what happens," he said.

Other Avengers who would be included in the movie are Scarlett Johanssen's Black Widow and Elizabeth Olsen's Scarlet Witch. It will also introduce new characters such as Tom Holland's Spider-Man and Chadwick Boseman's Black Panther.