Jim Henson
Self, various voices (archive footage)
Directing
Harry Belafonte
Self
Acting
Carol Burnett
Self
Acting
John Denver
Self
Acting
Frank Oz
Self / Miss Piggy / Fozzie Bear / Animal / Bert / ... (voice)
Acting
Steven Spielberg
Self
Directing
Ray Charles
Self
Acting
Dave Goelz
The Great Gonzo / Beauregard / Boober Fraggle / ... (voice)
Acting
Steve Whitmire
Kermit the Frog / Rizzo the Rat / Bean Bunny / ... (voice)
Acting
Kevin Clash
Clifford (voice)
Acting