AceShowbiz - Mark Ruffalo was hesitant to join the Marvel Cinematic Universe as he wasn't sure how he could make the role of "The Hulk" his own.
"I didn't know what I could add to what I already thought had been done so well before me."
Explaining his hesitation, Mark revealed he was only doing "indie movies up 'til that point. So I was like, 'I don't know if I'm the right person for this.' And Joss Whedon's like, 'Yeah, you are the right person.' "
"Then I got a call from Downey, it must've made it to him that I was hemming and hawing, and he just simply said, 'Ruffalo, let's go. We got this.' In true 'Iron Man' fashion. And then after that, I was like, 'I guess I have to do it.' "