Exclusive: Actor Kodi Smit-McPhee on the Challenge of Voicing 'ParaNorman'

For Let Me In star Kodi Smit-McPhee, a behind-the-scenes race took place while recording his voice for the title role in Laika's stop-motion supernatural comedy ParaNorman (due out on August 17th) that was almost as close as the race against time his character must undertake in order to save his town from the a horde of zombies. For Smit-McPhee faced something even more dangerous than the undead – puberty! Find out what he had to tell me yesterday at WonderCon 2012 about his work on ParaNorman, after the jump.

"It's a zombie movie pretty much," says Kodi Smit-McPhee when describing ParaNorman. "The main story is that this kid, Norman, he sees ghosts and he's teased by all these other kids, and his sister doesn't really like him; and his only friend [is a boy named] Neil. He ends up going on a mission – he has to save the world from a zombie invasion. And he ends up saving his town. It's very cool."

"Zombies have their own genre," adds McPhee, "so it's really cool [to do this film] now. The same people who did Coraline did this. It's stop-motion. So I think it's kind of eerie, with a Tim Burton feel to it."

"It took two years to do just the recording of the voice," explains the fifteen-year-old actor, "and then they went off for about a year and a bit, and did all of this. My voice changed one-hundred percent. I did one last session, and at that last session I couldn't record. I literally just made it."

Below, check out Norman and some of his zombie foes – who made a surprise visit to WonderCon this weekend.