‘Everest’ trailer: Jason Clarke, Jake Gyllenhaal, Josh Brolin in trouble

Sure, sure, scaling Mount Everest and surviving is one heck of a feat.

But have you seen the magnificent beards on Josh Brolin, Jason Clarke and Jake Gyllenhaal?

“Everest,” due out on Sept. 18, features a massive ensemble additionally including Keira Knightley, Robin Wright, John Hawkes, Emily Watson and Sam Worthington.

The snowy, windy, perilous 3D journey is directed by Baltasar Kormákur, and is based around true events from 1996 on the world's tallest mountain, as told in the novel “Into Thin Air: A Personal Account of the Mt. Everest Disaster” by Jon Krakauer.

If you already know, don't give it away, but who do you think will survive this climb?