'I Am Number Four' EXCLUSIVE: Director Details Alex Pettyfer And Dianna Agron's Roles

With "Beastly" bumped back to March 18, 2011, the release date jumble leaves its stars in an interesting predicament. Now "Beastly" will be coming out a week before Vanessa Hudgens' other starring vehicle, "Sucker Punch," and Alex Pettyfer will have been first known for "I Am Number Four," which he signed on to after "Beastly" but which is expected to be released February 2011.

"I'd be lying to you if I didn't tell you I was more excited that we were coming out first," director D.J. Caruso admitted to MTV in an exclusive interview. "The thing I like about Alex is that, first of all, he's this really dynamic, interesting, good-looking kid. But the most important element for me is that there's this real vulnerability. It's rare; you can see that, though there's a confidence there, there's a little bit of a pain that we can [relate to].

Alex will be starring opposite another high school musical star: Dianna Agron (pictured, left) of "Glee," who D.J. said is bringing a whole new persona to her character, Sarah. He said that, "totally against what she does on 'Glee,' [Dianna] is playing this sweet all-American girl who's a photographer in a small Midwestern town."

And then there's the film's other leading lady, Teresa Palmer ("The Sorcerer's Apprentice"), who plays fellow alien Number Six (not to be confused with that other hot Number Six from "Battlestar Galactica," mind you). D.J. described her character as "this hot, sexy chick on her Ducati [motorcycle] who can fight with swords and kill f--kin' aliens."

"I Am Number Four" has often been cited as the next "Twilight" or "Harry Potter"-sized phenomenon, and D.J. seemed to think that, because of the content of the stories (they have signed on for six installments of the film series) the comparison is apt. In his opinion, there seems to be plenty for everyone from the film.

"['I Am Number Four' has] this intergalactic romance, but it's still a very universal love story," he said. "And at the same time when you see this fighting and these Mogadorian blasters and people on cables and people transporting ... there are these bizarre and cool sci-fi elements that have a real sort of 'Kick-Ass' quality."

Are you looking forward to seeing "I Am Number Four"? Do you think it will be the next big teen franchise?