Jim Henson

Self, various voices (archive footage)

Harry Belafonte

Self

Carol Burnett

Self

John Denver

Self

Frank Oz

Self / Miss Piggy / Fozzie Bear / Animal / Bert / ... (voice)

Steven Spielberg

Self

Ray Charles

Self

Dave Goelz

The Great Gonzo / Beauregard / Boober Fraggle / ... (voice)

Steve Whitmire

Kermit the Frog / Rizzo the Rat / Bean Bunny / ... (voice)

Kevin Clash

Clifford (voice)