Cast (in credits order)
| Kevin Clash | ... | Elmo / Baby Natasha (voice) | |
| Bill Irwin | ... | Mr. Noodle | |
| Rest of cast listed alphabetically: | |||
| Fran Brill | ... | The Sun (voice) | |
 |
Dick Maitland | ... | Slimey (voice) |
| Andrea Martin | ... | Narrator / Penguins (voice) | |
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Jim Martin | ... | Computer (voice) |
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Joey Mazzarino | ... | Ingrid / The Little Penguin / Penguins / The Moon (voice) |
| Jerry Nelson | ... | TV Announcer (voice) | |
| Martin P. Robinson | ... | Slimey (puppeteer) | |
| David Rudman | ... | Humphrey (voice) | |
Animation Department
| Joey Ahlbum | ... | animator |