Frank Welker

as Megatron / Mirage / Rumble / Skywarp / Soundwave (voice)

Gregg Berger

as Cliffjumper / Narrator / Spike Witwicky / additional voices (voice)

Peter Cullen

as Optimus Prime / Ironhide (voice)

Frank Todaro

as Starscream / Wheeljack / Reflector / Sparkplug Witwicky (voice)

Arif S. Kinchen

as Jazz (voice)

Dan Gilvezan

as Bumblebee / Shockwave (voice)

Michael Bell

as Prowl (voice)

Victor Caroli

as Narrator (archive audio)

Paul Eiding

as Hound / Ratchet / Teletraan 1 / Thundercracker (voice)

Corey Burton

as Spike Witwicky / Shockwave / Brawn (archive audio)

Don Messick

as Gears / Ratchet (archive audio)

John Stephenson

as Huffer / Thundercracker (archive audio)

Scatman Crothers

as Jazz (archive audio)

Christopher Collins

as Starscream / Wheeljack / Laserbeak (archive audio)

Casey Kasem

as Cliffjumper / Bluestreak / Teletraan 1 (archive audio)