Jim Henson
Kermit the Frog, Waldorf, Rowlf the Dog, Link Hogthrob, The Swedish Chef, Dr. Teeth, The Newsman (voice)
Frank Oz
Miss Piggy / Fozzie Bear / Animal / Sam Eagle / Marvin Suggs / George the Janitor (voice)
Jerry Nelson
Floyd Pepper, Dr. Julius Strangepork, Pops, Robin the Frog, Lew Zealand, Louis Kazagger, Chicken, Crazy Harry (voice)
Dave Goelz
Gonzo / Zoot / Beauregard / Dr. Bunsen Honeydew (voice)
Richard Hunt
Statler, Scooter / Janice / Beaker / Wayne / Sweetums (voice)
Eren Ozker
Hilda / Wanda / Janice (voice)
Louise Gold
Annie Sue Pig / Additional Muppets (voice)
Kathryn Mullen
Additional Muppets (voice)
Steve Whitmire
Additional Muppets (voice)
Karen Prell
Additional Muppets (voice)
Brian Muehl
Additional Muppets (voice)
Bob Payne
Additional Muppets (voice)
John Lovelady
Bruce Fox / Rat (voice), House / Danceros / Headless Dancer (voice), Two-Headed Whatnot (voice), Rats / Scoff / House (voice), Gloat / Iggy Wiggy (voice), Easter Bernie (voice), Ghost / Harry (voice), Cowboy / Frogs (voice), Frogs / Monsters / Announcer (voice), Announcer / Rat (voice), Nigel / Barber (voice), Nigel / Pig Dancers (voice)
Peter Friedman
Crocodile / Banana (voice), Additional Muppets (voice), Andre the Artist (voice), Lead Mop (voice), Pa (voice)
Graham Fletcher
Ballerina Pig (voice) (uncredited), Fletcher Bird (voice), The Spider (voice)
Bernadette Peters
Self - Special Guest Star
Nancy Walker
Self - Special Guest Star
Dom DeLuise
Self - Special Guest Star
Rich Little
Self - Special Guest Star
Milton Berle
Self - Special Guest Star
Don Knotts
Self - Special Guest Star
Madeline Kahn
Self - Special Guest Star
Edgar Bergen
Self - Special Guest Star
Teresa Brewer
Self - Special Guest Star
John Cleese
Self - Special Guest Star
Cloris Leachman
Self - Special Guest Star
Zero Mostel
Self - Special Guest Star
Rudolf Nureyev
Self - Special Guest Star
Cleo Laine
Self - Special Guest Star
Judy Collins
Self - Special Guest Star
Elton John
Self - Special Guest Star
Petula Clark
Self - Special Guest Star
Bob Hope
Self - Special Guest Star
Julie Andrews
Self - Special Guest Star
Lou Rawls
Self - Special Guest Star
Steve Martin
Self - Special Guest Star
Peter Sellers
Self - Special Guest Star
George Burns
Self - Special Guest Star
Jaye P. Morgan
Self - Special Guest Star
