Joe Johnston talks 'Captain America' casting

Now that Chris Evans is officially on board for the lead role in Joe Johnston's upcoming superhero movie "The First Avenger: Captain America," it's time to find about about the whole casting thing, and the folks at earthsmightiest.com managed to get Johnston to answer a couple of questions on the subject. Get ready for a small surprise, folks.

On Evan's audition, Johnston said, "Chris didn't audition at all. I was already familiar with everything he'd done and was championing his cause, not that I had a fight from the Marvel team. They were fans of his as well. He came in to the art department to say hi, saw all the jaw-dropping art and designs on the wall and reacted the way I'd hoped he would."

Okay, fair enough. Evans didn't have to audition. Now, what about the role of Steve Rogers? Johnston: "Casting Captain America is really casting two roles...Steve Rogers before and after the transformation from 98 pound weakling to perfect physical specimen. I can't divulge how we're going to do it, but the performance will be Chris Evans from beginning to end."

For more of Johnston's answers, click here. "The First Avenger: Captain America" is on track for release July, 22, 2011.