Werewolf hunk Taylor Lautner shows off his beefed-up physique on the December cover of Men’s Health and ET’s got a behind-the-scenes peek at his photo shoot for the mag.

Taylor packed on 30 pounds of muscle in a year to convincingly depict Jacob Black’s transformation into an almighty werewolf in ‘The Twilight Saga: New Moon,’ which arrives Nov. 20. And the star says he plans on bulking up even more for the third ‘Twilight’ film, ‘Eclipse,’ expected out June 30, 2010. “My character continues to grow,” he tells Men’s Health, “so I’d like to pack on at least a few more lean pounds.”

Catch Taylor on the cover of the new issue of Men’s Health, on stands Nov. 17.

Click the image for HQ in our gallery!

Vampires are swarming like bats out of you-know-where, especially the mega-popular book-to-screen vamps of “Twilight,” “True Blood” and “The Vampire Diaries.” With more than 70 million books sold, Stephenie Meyer’s “Twilight” series is a full-fledged phenomenon, particularly among teens. The first “Twilight” movie adaptation grossed nearly $200 million in theaters last fall, which bodes well for next month’s sequel, “New Moon.” “True Blood,” based on Charlaine Harris’ Sookie Stackhouse novels, completed its second season in September and is HBO’s second-most-watched series ever, behind The Sopranos. And more people watched the debut episode of CW’s “The Vampire Diaries” than any premiere in the network’s history.