Zac Efron Gets Pumped

7/13/2007 4:26 PM PDT
Twinkly-eyed Zac Efron is a hottie in training -- for reals!

The 19-year-old "High School Musical" heartthrob worked up a sweat as he pumped up his boyishly taut and smooth chest at 24 Hour Fitness in L.A. by attempting to press over 100 lbs. on Thursday. No ID needed for this six-pack.

Between the gym and all that "Hairspray," this spring chicken has his beauty routine down pat!