THR: You cast a relative unknown as the lead in “Thor.” Will that be the Marvel casting strategy?

Feige: I think the Marvel way is casting the best actor for the part. It can be somebody relatively new, but it can also be someone like Robert Downey Jr., who you wouldn’t necessarily call an unknown. Chris Hemsworth came by the (“Iron Man 2″) set a few weeks ago. There was nobody around, but it was the historic meeting of Thor and Tony Stark. Within a few minutes, the crew was whispering, “There’s Thor.” Some of them had worked on “Star Trek,” so they knew who he was, but you could feel the buzz. He was wearing a T-shirt, but he was an imposing presence on the set.

Hollywood Reporter (click to read the full interview)