This holiday special goes back in time to show how Elmo's ancestors--not to mention those of Grover, Big Bird, Bert, Ernie, Oscar the Grouch and Cookie Monster--helped transform "the most unfriendly street in town" into the bright, kind, music-filled place it is today.
Audra McDonald
Caroler
Zosia Mamet
Bella
Jim Gaffigan
Santa Claus
Alan Muraoka
Alan
Suki Lopez
Nina
Ryan Dillon
Elmo (voice)
Eric Jacobson
Bert / Grover / Two-Headed Monster (voice)
Matt Vogel
Count von Count / Constable (voice)
