Zac Efron Runs Around Shirtless & Nearly Naked in These Amazing Photos!

He's one of Hollywood's hottest hunks, with a rock-hard body to be proud of. The year-old stripped off to nearly nothing as he hopped on a motorbike, wearing nothing but a flesh-coloured thong to protect his modesty, and little socks. Scroll down for video. Zac Efron stripped off to nearly nothing, flaunting his honed and toned physique on a motorbike while filming a scene for new movie Dirty Grandpa in Tybee Island, Georgia on Tuesday. His rippling physique and broad shoulders stood out in the midst of filming, his bulging biceps and perfect pecs stealing attention as he focused on keeping his balance on the vehicle.