Uh-oh, Christmas is in trouble! When the ten numbered boxes to Stiller the Elf's magical Christmas Counter-Downer become lost, the arrival of Christmas is in doubt. Can Elmo and Abby Cadabby find the missing boxes and restore the big countdown to everyone's favorite holiday? It just might take a Christmas miracle! Hosted by Elmo and Stiller the Elf (voiced by Ben Stiller) and his frosty sidekick, Stan the Snowball, Elmo's Christmas Countdown, produced by Sesame Workshop, the non-profit organization behind Sesame Street, airs SUNDAY, DECEMBER 23 (7:00-8:00 p.m., ET) on the ABC Television Network, and is destined to make a believer out of you!

In a world where reindeer report the news, Elves do yoga and Santa is issued speeding tickets, you never quite know what's going to happen. That's why it's good to have your friends around! Making appearances are many favorite Sesame Street residents, including Big Bird, Snuffy, Grover, Cookie Monster, Bert, Ernie, The Count, Oscar the Grouch, Prairie Dawn, The Three Bears and more.

Starring are Kevin Clash as Elmo, along with Sheryl Crow, Jamie Foxx, Charles Gibson, Anne Hathaway, Jennifer Hudson, Kevin James, Alicia Keys, Brad Paisley, Ty Pennington, Steve Schirippa, Tony Sirico and Ben Stiller.

The Muppet Performers are: Pam Arciero, Fran Brill, Leslie Carrara, Ryan Dillon, James Godwin, Andy Hayward, Eric Jacobson, Peter Linz, Noel MacNeal, Ed May, Paul McGinnis, Jerry Nelson, Marc Petrosino, David Rudman, Ian Sweetman, Matt Vogel, Bryant Young, Jennifer Barnhart, Tyler Bunch, Stephanie D'Abruzzo, Artie Esposito, BJ Guyer, Patrick Holmes, John Kennedy, Michael Lisa, Amanda Maddock, Joey Mazzarino, Tracie Mick, Carmen Osbahr, Martin P. Robinson, Andy Stone, Gabriel Velez, Steve Whitmire with Caroll Spinney as Big Bird and Oscar. Also appearing are the Brooklyn Youth Chorus and Tiffany Curl.