With all the socializing the actors of The Twilight Saga are doing in Vancouver, it's easy to forget that the cast is cranking out two feature films this year. But the second trailer Summit Entertainment has released of New Moon proves they've been hard at work.

Taylor Lautner narrates the action-packed trailer, which features glimpses of the 17-year-old actor shirtless, showing off the chiseled torso he worked on to land the role of Jacob.

"Jacob has changed in a lot of different ways," Lautner says in the trailer. "He's bigger, he's 30 pounds bigger!"

The actor, who is currently with the cast in Vancouver and set to begin filming Eclipse, says his physique isn't the only thing in New Moon that's different from Twilight.

"New Moon is a lot more complicated than Twilight was," he says. "As time goes on, the heat starts building. New Moon is going to be stepped up a whole other notch. There's going to be a lot more action, especially with the werewolves involved."

He adds, "I think the fans are really going to be happy."