VIDEO: Ana Gasteyer & More Go Behind-The-Scenes of FOX's A CHRISTMAS STORY LIVE!

Below, Ana Gasteyer and more take you behind-the-scenes of rehearsals for A CHRISTMAS STORY LIVE!, airing this Sunday, December 17th at 7/6c on FOX! Maya Rudolph ("Saturday Night Live," "Bridesmaids"), Matthew Broderick ("How to Succeed in Business without Really Trying," "The Producers," "Manchester by the Sea"), Jane Krakowski ("Unbreakable Kimmy Schmidt," "30 Rock"), Chris Diamantopoulos("Good Girls Revolt," "Silicon Valley," "Episodes"), Ana Gasteyer ("Saturday Night Live"), Ken Jeong ("The Hangover," "Dr. Ken),David Alan Grier ("The Carmichael Show"), newcomer Andy Walken and PRETTYMUCH will star in the holiday special.

Inspired by A CHRISTMAS STORY LIVE!, FOX is creating the Greatest GIFt - each day, a new GIFt will post, leading up to the Sunday, Dec. 17 premiere, encouraging fans to share it with their friends and family. Every time the GIFt is shared, FOX will donate a dollar to Toys For Tots, up to $20,000.

From Warner Horizon Unscripted & Alternative Television, A CHRISTMAS STORY LIVE! is inspired by the holiday classic feature "A Christmas Story" and the Tony Award-nominated Broadway production "A Christmas Story: The Musical." Alex Rudzinski ("Grease: Live," "Dancing with the Stars") is an executive producer and will serve as the live television director. Benj Pasek and Justin Paul ("Dear Evan Hansen," "La La Land"), who composed the original score to "A Christmas Story: The Musical," will compose several new songs for the LIVE television event.

Watch here: