Zac Efron Shows Off Major Muscles While Swinging in Hawaii

Zac Efron gives the camera a serious flexing pose while shirtless and cooling off in a lake on Saturday (June 13) in Hawaii.

The 27-year-old actor was joined by his Mike and Dave Need Wedding Dates co-star Adam DeVine, who swung on a swing nearby.

PHOTOS: Check out the latest pics of Zac Efron

“Aloha,” Zac captioned the Twitter photo.

The day before, Zac and Adam were seen shooting an intense argument scene for the film on the beach in Oahu.

Click below to see a bigger photo of the guys shirtless!