With the help of his Sesame Street friends, Big Bird leads Snuffy on a fun-filled trip through the alphabet. Cookie Monster sings the praises of "C" (for "cookie," of course), while Oscar loves "I" and "icky ice cream cones." Special guest Lena Horne joins in on all the musical fun as well. Whether you have a favorite letter, or love'em from A to Z, you'll find them all here in delightful alphabetical disorder.
| Actor | Role |
|---|---|
 Caroll SpinneyBig Bird/Oscar the Grouch (voice) | Big Bird/Oscar the Grouch (voice) |
 Martin P. RobinsonSnuffy/Telly Monster/Buster the Horse/Irvine the Grouch (voice) | Snuffy/Telly Monster/Buster the Horse/Irvine the Grouch (voice) |
 Pam ArcieroDentist (voice) | Dentist (voice) |
 Emilio DelgadoLuis Rodriguez | Luis Rodriguez |
 Jim HensonErnie/Kermit the Frog/King Peter the Persnickety (voice) | Ernie/Kermit the Frog/King Peter the Persnickety (voice) |
 Lena HorneSelf | Self |
 Jerry NelsonMr. Johnson/Herry Monster/Townsperson (voice) | Mr. Johnson/Herry Monster/Townsperson (voice) |
 Frank OzCookie Monster/Bert/Grover/Princess Penelope (voice) | Cookie Monster/Bert/Grover/Princess Penelope (voice) |