STAGE TUBE: Behind the Scenes - William Shatner and More Audition for NBC's HAIRSPRAY LIVE!

HAIRSPRAY LIVE!, which airs Wednesday, Dec. 7 at 8 p.m. ET/PT from Los Angeles (so soon!), has just released "unseen footage" of its audition process, featuring appearances by other stars from the NBC family - check it out below!

The all-star cast of HAIRSPRAY LIVE! will feature newcomer Maddie Baillio as Tracy Turnblad, Harvey Fierstein as Edna Turnblad, Jennifer Hudson as Motormouth Maybelle, Martin Short as Wilbur Turnblad, Derek Hough as Corny Collins, Ariana Grande as Penny Pingleton, Andrea Martin as Prudy Singleton and Kristin Chenoweth as Velma Von Tussle. Rosie O'Donnell and Sean Hayes will also make special appearances in the broadcast.

Based on the Tony Award-winning Broadway musical, HAIRSPRAY LIVE! takes place in 1962 Baltimore. Teenager Tracy Turnblad's dream is to dance on "The Corny Collins Show," a local TV program. When, against all odds, Tracy wins a role on the show, she becomes a celebrity overnight and meets a colorful array of characters, including the resident dreamboat, Link; the ambitious mean girl, Amber; an African-American boy she meets in detention, Seaweed; and his mother, Motormouth Maybelle, the owner of a local record store. Tracy's mother is the indomitable Edna Turnblad, and she eventually encourages Tracy on her campaign to integrate the all-white "Corny Collins Show."