Zac Efron recently rode a horse shirtless while on vacation in Sardinia, Italy. (Still so excited that those words go together.) It was glorious. So glorious in fact that we had to round up nine more sexy celebs showing off their fine equestrian form. We've got everyone from Brad Pitt to Tom Hiddleston, so get ready for some serious star and horsepower!
Image Source: AKM-GSI