The hunk in trunks is none other than Dylan Efron, brother of High School Musical alum Zac Efron, 37. Dylan, who is the young sibling of the two at 33-years-old, showed off his impressive physique ...
Zac Efron gave fans what they've been looking for ... a pair of weights while lying shirtless in a pair of swimming trunks on an exercise ball on a deck. "Thanks for the well wishes." ...