Zac Efron Doing Push-Ups Leads Today’s Star Sightings

Zac Efron Shirtless Supercut
Watch all the times Zac Efron has been shirtless on the big screen.

So, this is why Zac Efron is so buff!

The actor was spotted doing some push-ups in between takes while on the set of Dirty Grandpa in Tybee Island, Ga. this week., Unfortunately not shirtless Clad in a in a grey sweater and jean, Efron was seen fitting in an impromptu workout session while he waited for his turn to film.

Also starring Julianne Hough and Robert DeNiro, Dirty Grandpa is currently slated for an August 2016 release.