Sandra Bullock and Tom Hanks on Making a 9/11 Film

ET was at last night's NYC premiere of Extremely Loud and Incredibly Close, where the film's stars talked about the sensitive nature of making a film about the September 11 tragedy.

Sandra Bullock said she was moved right away once she read the script based off the novel by Jonathan Safran Foer, but more importantly, the film is "respectful."

"You have to make sure you move them in the right way," Bullock said. "If the story moves you in the right way, it moves you in the most honorable and respectful way. And I think [director] Stephen Daldry did the most beautiful job translating this already amazing book into something that I don't think has ever been done before."

MORE: Sandra Bullock on Returning to Movies After Hiatus

Tom Hanks echoed Bullock's sentiments.

"In a lot of ways you can say that this movie was 10 years in the making because it deals with the individual details of what was probably the most serious day in all of our lives," Hanks said. "Part of the test that this screenplay had to pass was whether or not it held up, and just the verisimilitude on one hand, but also does it have the weight to warrant the movie being made in the first place? And I felt that it did."

Hanks also had high praise for his 13-year-old co-star Thomas Horn, who's nominated for a Critics' Choice Award for best young actor/actress in a film.

"He's an extraordinary kid in that he was willing to do it in the first place," Hanks said of Horn, who was discovered when he won $31,000 during an episode of Jeopardy! Kids Week. "I don't think he has any dreams -- he's not like a kid who goes to bed every day thinking about show business -- and yet he was willing to open himself up and come in and not just fake the behavior, but create the behavior that was going to be necessary."

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Check out the video to see our Sandra Bullock interview get hilariously interrupted by Hanks' wife Rita Wilson, as well as Viola Davis's reaction to her recent Screen Actors Guild and Golden Globe nominations for her performance in The Help.