VIDEO: Derek Hough Talks HAIRSPRAY LIVE!; Mark Ballas Wedding & More on 'Ellen'

Multi-talented actor, singer and dancer Derek Hough stopped by today's ELLEN to discuss all of his latest roles - both onscreen and off, including NBC's upcoming HAIRSPRAY LIVE!. "It's a challenge, the extent of it, the magnitude of it, it's like filming a full-length feature film live before your eyes," shares the DWTS' pro. Watch the appearance below!

NBC's HAIRSPRAY LIVE will air Wednesday, Dec. 7 at 8 p.m. ET/PT and will originate from Los Angeles. The all-star cast 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.

Live television director Alex Rudzinski will join director Kenny Leon ("The Wiz Live!"). Craig Zadan and Neil Meron (the upcoming "A Few Good Men Live!") serve as executive producers of "Hairspray Live!" Harvey Fierstein will provide a new teleplay and Jerry Mitchell ("Kinky Boots," "On Your Feet") will serve as choreographer for the live production with music and lyrics by Marc Shaiman and Scott Wittman ("Smash" and Broadway's upcoming "Charlie and the Chocolate Factory"). Derek McLane serves as production designer.

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."