We know that British action man Bear Grylls is about to venture into the wild with Hollywood celebrities like Zoolander star Ben Stiller and 21 Jump Street actor Channing Tatum, but we didn’t know he was going to get so intimate with 17 Again star Zac Efron.

A new trailer for NBC’s Running Wild with Bear Grylls (due to air in the US this month) shows the pair topless and tied to each other as they traverse down the side of a cliff, before plunging into a freshwater pool.

“We’ve started together, we’re going to finish together,” says Grylls in the clip. “We’re going to rappel, side by side, together.”

The six-part show sees Grylls take A-listers into the wilderness for 48-hours each, visiting wild places including Utah, Scotland and the Catskill Mountains.

Watch the clip below:


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