Zac Efron Shows Off His Bod Backstage at 'Jimmy Kimmel'

Zac Efron and longtime love Sami Miro stay close as they walk into studio on Thursday afternoon (January 21) in Hollywood, Calif.

The 28-year-old actor was headed to an appearance on Jimmy Kimmel Live! to promote his upcoming film Dirty Grandpa.

PHOTOS: Check out the latest pics of Zac Efron

While getting ready for the taping backstage, Zac took to his Instagram to share a funny shirtless photo showing off his incredible body.

“I woke up like this @jimmykimmel #dirtygrandpa,” he captioned the image.