Watch Allison Williams Shine in New 'Peter Pan Live!' Video

The Girls star admits she is intimidated by "the bigness of it"

Allison Williams will never grow up!

In NBC’s newest behind-the-scenes video for its upcoming live TV event, Peter Pan Live!, Williams admits she was nervous about taking on the role of the boy who can fly.

“I’m not going to lie, the bigness of it felt scary for a hot second,” she says in the promo video.

Williams, who adds that she is the “luckiest girl the luckiest boy-girl in the world,” told PEOPLE last month that flying through the air might be her favorite part of all: “It gets uncomfortable, but the moment you lift off the ground is utter bliss.”

The video also features Christopher Walken rehearsing as Pan’s nemesis, Captain Hook, who says in his behind-the-scenes interview that he loves going back to his musical roots for the show. “It’s been fun – I dance a little, I sing a little. That’s what I do.”

Williams adds that working with the legendary actor was nothing short of awe-inspiring. “He is so deeply cool,” she says. “Even when he’s not doing anything, he is better at acting than I’ve ever been. Even when he’s just sitting around, he’s funnier than I’ve ever been.”

Peter Pan Live! also stars Christian Borle as Mr. Darling and Smee. Borle also starred in last year’s Sound of Music Live! as Max Detweiler. NBC recently added Minnie Driver to the cast as an adult version of Wendy, who will also serve as narrator and appear in the final scene.

Peter Pan Live! premieres Thursday, Dec. 4 (8 p.m. ET), on NBC.

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