"Twilight" Fans Cause Frenzy At Comic-Con

San Diego, CA (CNS) - The best-selling young-adult book "Twilight" is headed for the big screen in December, but fan frenzy for the film almost took over Comic-Con on Thursday.

According to the Associated Press, hundreds of teens camped overnight outside the San Diego Convention Center for a chance to see early footage of the film. They were also hoping to get a glimpse at the cast of heartthrobs set to bring the teen-vampire tale to life.

Thousands of fans, many wearing homemade T-shirts proclaiming their preference for either Edward or his love-rival, Jacob, filled the convention's largest exhibition hall, drowning out the cast introductions with enthusiastic, high-pitched screams.

Robert Pattinson, 22, is playing the role of Edward and said he has been overwhelmed by the attention the role has brought him.

"It's kind of terrifying in a lot of ways," he said in an interview. "I still can't really come to terms with it... As soon as one person started to recognize me, literally now I'm just freaking out the whole time."

The British actor previously appeared as Cedric Diggory in "Harry Potter and the Goblet of Fire" and "Harry Potter and the Order of the Phoenix."

"Twilight," a Summit Entertainment release, is slated for release Dec. 12.