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The Avengers is already a box office hit oversees and Hollywood hunks Chris Evans and Chris Hemsworth give all the credit to Robert Downey Jr.

Evans and Hemsworth stopped by Good Morning America Monday to promote the new blockbuster, which stars an impressive ensemble cast of Scarlett Johansson, Mark Ruffalo, Jeremy Renner, Samuel L. Jackson, Gwyneth Paltrow and more. But if it weren't for Downey, 47, the film may not have happened according to Evans.

"I kind of give a lot of credit to Downey," Evans, 30, told GMA. "He's kind of the father of this group. If he hadn't done so well with those Iron Man movies, I don't think this movie would have happened."

"He came to the set with such a positive attitude and has such a great demeanor," he added. "We all kind of fell in line as a result of his disposition. He's just an amazing guy and he made it a really family atmosphere right away."

And Hemsworth said they were happy to have smaller parts in the film because it meant a little less pressure.

"I think we all preferred it to be honest," the 28-year-old Australian star said. "When you do your individual films the responsibility rests on your shoulders whereas, this, you get to share the workload. And I'm happy to do that any day. It makes it much easier."

The superhero movie earned $178 million this weekend overseas. Tell Us: Will you be seeing The Avengers in theaters Friday?