Guess The 62-Year-Old Zaddy In This Shower Shot!

It's Wednesday y'all, which means we've got a hump-day treat in store ... Can you guess which Hollywood hunk put his summer bod on full display in this eye-popping pic?!

He turned 62 yesterday and splashed this shower shot on the 'gram ... He famously played himself on 'Entourage' -- as did his co-star Bob Saget. He may be one-hot zaddy, but his claim to fame was playing Uncle Jesse!