There's intergalactic trouble when the lyrics Judy Jetson wrote for teen heartthrob Sky Rocker are swapped with a secret message from a music-hating witch. Now it's up to Judy, her family, and friends to save rock-and-roll.
| Actor | Role |
|---|---|
 George O'HanlonGeorge Jetson (voice) | George Jetson (voice) |
 Penny SingletonJane Jetson (voice) | Jane Jetson (voice) |
 Janet WaldoJudy Jetson (voice) | Judy Jetson (voice) |
 Daws ButlerElroy Jetson (voice) | Elroy Jetson (voice) |
 Rob PaulsenSky Rocker / Zany (voice) | Sky Rocker / Zany (voice) |
 Mel BlancMr. Spacely (voice) | Mr. Spacely (voice) |
 Michael Bell(voice) | (voice) |
| PP.L. Brown(voice) | (voice) |
| SSteve Bulen(voice) | (voice) |
 Ruth BuzziFelonia Funk (voice) | Felonia Funk (voice) |
 Hamilton Camp(voice) | (voice) |
| SSelette Cole(voice) | (voice) |
 Peter Cullen(voice) | (voice) |
 Pat Fraley(voice) | (voice) |
| DDon Messick(voice) | (voice) |
 Cindy McGee(voice) | (voice) |
 Pat Musick(voice) | (voice) |
| EEric Suter(voice) | (voice) |
 Jean Vander Pyl(voice) | (voice) |
 B.J. Ward(voice) | (voice) |
 Beau Weaver(voice) | (voice) |