Zac Efron gets to showcase the results of his regular gym workouts in new movie 17 Again.

The High School Musical heart-throb returns to the classroom to play a younger version of Friends star Matthew Perry, whose 37-year-old character Mike is magically transformed back in time to high school so he can live his life over.

Luckily for us, the role requires Zac to peel off his shirt to reveal his ripped bod.

Vanessa Hudgens is one lucky girl!