Sonia Manzano
— Maria
Caroll Spinney
— Big Bird / Oscar (voice)
Jim Henson
— Kermit / Ernie / Bip Bippadotta (voice)
Frank Oz
— Bert / Grover / Cookie Monster (voice)
Fran Brill
— "OP" Family Song (voice)
Jerry Nelson
— "OP" Family Song / Farley / Two-Headed Monster (voice)
Richard Hunt
— Two-Headed Monster (voice)
Martin P. Robinson
— Old MacDougal / Rocky (voice)
Kevin Clash
— Sam / Ferlinghetti Donizetti (voice)
Pam Arciero
— Pammy / Honkers (voice)
Dick Maitland
— Slimey (voice)
Northern Calloway
— Same Sound Brown (voice)