Elmo by Richard Termine/Sesame Workshop
(voicing an elf named... Stiller) and
The Sopranos' Tony Sirico
(as a wannabe Bert and Ernie) are but a few of the stars who will help out with
Elmo's Christmas Countdown
, a one-hour holiday special coming to ABC. Per the
are also set to appear as themselves to perform in musical numbers, while Big Bird, Grover, Oscar, Snuffie and the Count will be representin' for the "I've got someone's hand inside me" set.