Jim Henson

Kermit the Frog / Rowlf the Dog / Dr. Teeth / Swedish Chef / Waldorf / Ernie / Self

Frank Oz

Miss Piggy / Fozzy Bear / Animal / Sam the Eagle / Bert / Grover / Cookie Monster

Dave Goelz

Gonzo / Dr. Bunsen Honeydew / Zoot / Beauregard / Boober Fraggle

Jerry Nelson

Robin the Frog / Camilla the Chicken / Floyd Pepper / Lew Zealand / Pops / The Count / Gobo Fraggle / Herry Monster

Richard Hunt

Scooter / Janice / Statler / Beaker / Gladys the Cow / Two-Headed Monster / Snowman (voice)

Kathryn Mullen

Mokey Fraggle (voice)

Steve Whitmire

Turkey / Rizzo the Rat / Wembley Fraggle / Sprocket the Dog / Lips (voice)

Caroll Spinney

Big Bird / Oscar the Grouch (voice)

Karen Prell

Red Fraggle / Maureen the Mink (voice)

David Rudman

Miss Piggy's Photographer (voice)

Gerard Parkes

Doc

Terry Angus

Additional Muppet Performer (uncredited)