Hulk Is 'The Hardest Character By Far' For 'Avengers' Director Joss Whedon

Hulking out ain't easy. So far, it's taken three actors to get the not-so-jolly green giant right on the big screen: Eric Bana, Edward Norton, and now Mark Ruffalo, who steps into the purple trunks with this summer's "The Avengers."

Director Joss Whedon has a lot of tough acts to juggle when it comes to Earth's Mightiest Heroes, but even he admits that Bruce Banner's angry alter-ego might be the trickiest of the lot. Speaking with SFX, Whedon addressed exactly what he needed to do the Hulk justice.

“So much," he said. "A Bruce Banner who’s not obsessed with his own problems. A Hulk who not only feels flesh and blood, but is clearly an extension of Banner himself and not just a CGI thing that roars. A Hulk who feels dangerous, who might actually hurt someone we care about, who belongs in a classic horror film. And much more. He’s the hardest character by far, and ended up being the most fun.”

One of the elements that made him so fun? The man behind the mask—or, in this case, the actor in a motion-capture suit.

“Mark is such a delightful mensch it’s stupid," Whedon said of working with Ruffalo. "His Banner is a bunch of contradictions: graceful and awkward, meek and confident, erudite and working class, funny and sad. And contradictions are what the Banner/Hulk dynamic are all about. Also, Mark kinda looks like the Hulk. So we got to build our Hulk from him.”

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