Twilight hunk Taylor Lautner bared his bulging baseball biceps at LAX airport Sunday night in Los Angeles, presumably heading east for a week of  rehearsals  leading to his first-ever stint hosting Saturday Night Live on December 12th.

PHOTOS: Taylor Lautner Pumped At LAX

Its clear the 17-year-old New Moon star has been keeping a rigorous pace at the gym to maintain the bulky look required for the role of Jacob Black.

PHOTOS: Taylor Lautner’s Style Through The Years

While in LaLa Land, Lautner was able to spend a little time with his romantic interest, country cutie Taylor Swift, who hosted SNL in November.

PHOTOS: Taylor and Taylor’s Date Night

Lautner and Swift’s romance likely began on the set of Valentine’s Day, a romantic comedy the two filmed last July, which hits theaters February 12, 2010. In the meantime, Lautner can be seen in New Moon, which is in theaters now.