Chris Evans has revealed he based his interpretation of Captain America on a boy scout friend he grew up with.
The Fantastic Four star is playing Steve Rogers in comic book movie Captain America: The First Avenger, released next year, about a World War II soldier who undergoes a secret military operation to make him superhero, fighting fit.
Chris told Wizard magazine: "He's a real redeeming character to play, it's exciting to think of playing him.
"I actually have a friend of mine who I'm modelling the character after. This guy is actually an Eagle Scout, he's one of those guys who stayed in the Boy Scouts all the way until he was 18.
"He's just a good human being. He does the right things, he's open, he's honest, he's sincere, he's selfless. It's something that I think everyone aspires to. A lot of time I play characters who don't have any redeeming quality."
Chris, who played the Human Torch in the Fantastic Four films, admits he has been in a few films that have "missed the mark", which he found hard, but he has very high hopes for Captain America.
He said: "It's upsetting working as hard as you can in your respective field, given the fact that a film has all these difference creative elements to it, and you can only do so much with what you are expected to do. And it's a disappointment when a film comes out and it's not what you hoped it would be.
"There's really no formula: I've seen a lot of movies that I would have gladly walked out of the theatre that made hundreds of millions of dollars at the box office."