Fans have been howling over Taylor Lautner, who has packed on 30 pounds of muscle to play werewolf Jacob in the Twilight sequel New Moon (out Nov. 20).
"It's actually quite uncomfortable knowing so many people are seeing that!" Lautner, 17, told Usmagazine.com Saturday at Teen Vogue's 7th Annual Young Hollywood party in L.A. "It's a little bit embarrassing!"
Beefing up took "a lot of hard work," said Lautner, who also goes shirtless in the sequel. "Eating, working out - a lot of stuff."
He is now shooting the film's third installment Eclipse.
"It's really good," he said. "We are having a lot of fun hanging out up in Vancouver."
Want to see more of Lautner? Pick up October's Teen Vogue, where he graces the cover.
"It's crazy!" he said of landing the cover.
Selena Gomez — whom Lautner dated earlier this year — thinks the magazine made the right choice.
"He is kind of 'It' at the moment!" she told Us at the Teen Vogue bash. "I think it's so awesome he is on the cover."