Taylor Lautner is everywhere these days – including on the cover of Rolling Stone magazine.

The star of The Twilight Saga: New Moon doesn’t turn 18 until February but he he’s looking like a grown man!

He tells the magazine that his love of martial arts has helped him in his star-making role as werewolf Jacob in the Twilight series.

“This could have happened to anyone who played Jacob,” he says “It’s Twilight. It’s not me personally.”

But his hard work is inescapable: he started learning karate at age six and moved on to Xtreme Martial Arts, relocating with his family to Los Angeles to pursue acting and stomaching the bullying that came along with it. He put on 30 pounds of muscle between the first two Twilight films. He found time to shoot the upcoming Valentine’s Day with Taylor Swift, with whom he “instantly clicked,” he admits. “Aside from being beautiful, she’s extremely funny, charismatic and fun to be around.”

The magazine writes that Lautner is quiet and guarded, more of a Zac Efron than a Lindsay Lohan, as far as young stars go.

“He’s so picky. I was the first person who got him to eat sushi,” New Moon costar Kristen Stewart tells RS. “He’s very set in his ways. But that is very informative of his personality. He’s very steady. He has a really solid sense of himself.”