Zac Efron Goes Shirtless for 'Baywatch' Swimming Lessons!

Zac Efron shows off his muscular physique while going shirtless in a pair of wetsuit pants at a swimming class on Thursday (January 21) in Los Angeles.

The 28-year-old actor is preparing for his role in the upcoming movie Baywatch and we can’t wait to see him running along the beach!

PHOTOS: Check out the latest pics of Zac Efron

Zac doesn’t seem to have a problem showing off his buff body lately. His new movie Dirty Grandpa is in theaters now and features him showing a lot of skin and just last night during his stop at Jimmy Kimmel Live, he tweeted out a shirtless pic from backstage.

40+ pictures inside of Zac Efron at his swimming lesson…