Tim Curry

as Narrator (voice)

Joey Mazzarino

as Joe Marley / Joey Dickens / Lightning (voice)

Kevin Clash

as i-SAM / Elmo (voice)

Caroll Spinney

as Oscar the Grouch / Big Bird (voice)

Kristin Chenoweth

as Christmas Carol (voice)

Rickey Boyd

as Rhubarb the Grouch (voice)

Matt Vogel

as Additional Muppet Performer (voice)

Jim Martin

as Additional Muppet Performer (voice)

Frank Oz

as Bert (voice) (archive footage)

Jim Henson

as Ernie (voice) (archive footage)

Martin P. Robinson

as Snuffy (voice) (archive footage)

Pam Arciero

as Additional Muppet Performer (voice) (archive footage)

Fran Brill

as Additional Muppet Performer (voice) (archive footage)

Alice Dinnean

as Additional Muppet Performer (voice) (archive footage)

Eric Jacobson

as Additional Muppet Performer (voice) (archive footage)

Peter Linz

as Additional Muppet Performer (voice) (archive footage)

Noel MacNeal

as Additional Muppet Performer (voice) (archive footage)

Jerry Nelson

as Additional Muppet Performer (voice) (archive footage)

Carmen Osbahr

as Additional Muppet Performer (voice) (archive footage)

David Rudman

as Additional Muppet Performer (voice) (archive footage)

John Tartaglia

as Additional Muppet Performer (voice) (archive footage)

Steve Whitmire

as Additional Muppet Performer (voice) (archive footage)

Bryant Young

as Additional Muppet Performer (voice) (archive footage)

Carlo Alban

as Carlo (archive footage)

Alison Bartlett

as Gina (archive footage)

Desiree Casado

as Gabi (archive footage)

Emilio Delgado

as Luis (archive footage)

Will Lee

as Mr. Hooper (archive footage)

Loretta Long

as Susan (archive footage)

Sonia Manzano

as Maria (archive footage)

Bob McGrath

as Bob (archive footage)

Roscoe Orman

as Gordon (archive footage)

Imani Patterson

as Miles (archive footage)

David Langston Smyrl

as Mr. Hanford (archive footage)

Charles Edward Hall

as Santa Claus (archive footage)

Mark Aaron Beckett

as Self (archive footage)

B. David Whithworth

as Self (archive footage)

Glenny T

as Self (archive footage)

Tony Zeke

as Self (archive footage)

Calvin Powell

as Self (archive footage)

Brian Gore

as Snowman (voice) (uncredited)