Steve Whitmire as Ernie / Mo / Troll / Frosty Four Leader (voice)

Eric Jacobson as Bert / Grover (voice)

Fran Brill as Prairie Dawn / Zoe / Frosty Four Singer (voice)

Kevin Clash as Benny Rabbit / Elmo / Frosty Four Singer (voice)

Carmen Osbahr as Rosita (voice)

Stephanie D'Abruzzo as Flo / Frosty Four Singer (voice)

David Rudman as Cookie Monster (voice)

Jim Henson as Kermit the Frog / Bip Bippadotta / Lavender Anything Muppet in Fat Cat (voice) (archive footage)

Louise Gold as Chicken (voice)

Caroll Spinney as Oscar the Grouch (voice) (archive footage)

Frank Oz as Bert / Cookie Monster (credit song) / T-Shirt Salesman / Fat Blue Anything Muppet in Fat Cat (voice) (archive footage)

Jerry Nelson as Kermit the Forg / Kermit the Gorf / Kermit the Grof / Green Anything Muppet in Fat Cat (voice) (archive footage)

Richard Hunt as Harry (voice) (archive footage)

Ivy Austin as Bookworms Leader (voice) (archive footage)