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)