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)

Caroll Spinney

Big Bird / Oscar the Grouch (voice)