Zac Efron Shows Off Ripped Abs, Bros Out at Lake With Mike and Dave Need Wedding Dates Costar Adam DeVine: Photos

Zac Efron
Zac Efron and his Mike and Dave Need Wedding Dates costar Adam DeVine showed off their muscles near a lake in Hawaii on Sunday, June 14  AKM-GSI

Because when you're pals with Zac Efron, you have to be shirtless. The former Disney star showed off his ripped abs once again this week, but this time, while hanging out with his Mike and Dave Need Wedding Dates costar Adam DeVine. The hunky twosome went swimming at a lake in Oahu, Hawaii, on Sunday, June 14.

zac efron
Zac Efron AKM-GSI
zac efron
Zac Efron in Hawaii AKM-GSI

Efron, 27, wasn't shy about baring his toned body in blue swim trunks. He flexed his muscles, and used a rope to swing and jump into the water several times during the adventurous afternoon. His buddy DeVine, meanwhile, held on tight to a tire swing before getting soaked. He also threw his white T-shirt to the side while taking a photo with Efron.

Adam Devine
Adam DeVine AKM-GSI
zac efron
Zac Efron AKM-GSI

"Here's to me being way more muscular and generally more shredded than my lil bro @zacefron," the Pitch Perfect 2 actor, 31, joked via Instagram on June 8. "In our off time we jump off waterfall's and nearly escape death. Nbd. Having so much fun shooting #mikeanddaveneedweddingdates this summer in Hawaii!"

Efron also documented the ever-so-cool bromance via Twitter. "Aloha," he captioned a pic of the two over the weekend. In a tire swing video, he added: "#COWABUNGA."

Being away from L.A., however, hasn't been all fun and games. On June 14, he retweeted his girlfriend Sami Miro, who wrote: "I miss my babyyyyyyy."

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