Chris Evans feels "incredibly comfortable" playing Captain America.

Chris Evans

Chris Evans

The 33-year-old actor has confessed he was nervous when he first landed the role because he was worried comic book fans wouldn't accept him but now, having starred as the superhero in a number of films, he's comfortable enough to mix things up.

Asked if it's easy to slip back into character, he said: "Absolutely. When you first take on the role, it's intimidating, and you're scared the fans may not accept you. Now, I feel incredibly comfortable with it, and that's when you start trying to challenge the character and forge new territory."

The 'Avengers: Age of Ultron' actor is set to appear alongside Robert Downey Jr's Iron Man in the next instalment in the Captain America franchise, 'Civil War', but insists his character - who is also named Steve Rogers - will still be the main focus.

He told Total Film magazine: "I think [directors] the Russo brothers are dedicated to trying to make sure this does stay a 'Captain America' film. It is ultimately Steve Rogers' struggle in the film, even though we do have so many characters.

"Marvel know how to strike a balance and how to use the movie as a jump off to the 'Avengers: The Infinity Wars'."

Evans also spoke of his excitement at having Spider-Man come on board as well.

He added: "That's something you want to see as a fan! Y'know, personally, independent of my involvement as 'Captain America', that's something I'd want to see as a comic-book fan. That's going to be a real treat for a lot of the fans out there."