Zac Efron Goes Shirtless For 'Jimmy Kimmel Live'

Zac Efron and his girlfriend Sami Miro head inside a studio on Thursday afternoon (January 21) in Hollywood.

The 28-year-old actor was on his way 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.