Battle of the Abs: Zac Efron and Seth Rogen Go Shirtless for 'Neighbors 2' Party Scene

The actor, 27, was snapped Tuesday in Atlanta during production on the sequel

Photo: FameFlynet

Here is one thing we know for sure about Neighbors 2: It’s going to feature a very shirtless Zac Efron.

The actor, 27, was snapped Tuesday in Atlanta during filming for the sequel while wearing little more than tiny orange shorts during a party scene.

Costar Seth Rogen was also spotted during the shoot; and, because this is comedy, he wore a mirror of Efron’s tight orange shorts, plus an animal print face covering, hat and glasses. Oh, and let’s not forget the brown marker meant to mimic a muscular torso.

The film, which reteams Efron, Rogen, 33, and Rose Bryne, has been filming for several weeks in Atlanta.

Also returning? Mindy Project actor Ike Barinholtz, as Rogen’s friend Jimmy.

Zac Efron’s Changing Looks!

Barinholtz confirmed this himself this week, posting several pictures from the set with his costars while wearing a haphazard clown costume, including a smear of red and white makeup.

On Thursday, Efron announced a new, behind-the-scenes Snapchat for the production: “#Neighbors2 is taking my Snapchat virginity today. See what it’s like on set and add us at “NeighborsMovie” Let’s get weird.”