Bear Grylls and Zac Efron

Zac Efron is jumping feet first into his latest television gig.

On the July 28 premiere of Running Wild with Bear Grylls, Efron and Gryllsrappel down a cliff in the Catskills Mountains — shirtless, of course.

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"I can't believe how high this is," an apprehensive-looking Efron notes before taking the plunge.

"We're now committed," Grylls says, shortly after chucking his and Efron's backpacks into the water below. "We started together, we're going to finish together."

Other celebrities set to embark on similar adventures with Grylls forRunning Wild include Channing Tatum and Ben Stiller.

Check out a sneak peek of Efron on the Running Wild premiere below. Will you watch?

Running Wild with Bear Grylls premieres Monday, July 28 at 8/7c on NBC.