Frank Welker

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

Gregg Berger

Cliffjumper / Narrator / Spike Witwicky (voice)

Peter Cullen

Optimus Prime / Ironhide (voice)

Frank Todaro

Starscream / Wheeljack / Reflector / Sparkplug Witwicky (voice)

Arif S. Kinchen

Jazz (voice)

Dan Gilvezan

Bumblebee / Shockwave (voice)

Michael Bell

Prowl (voice)

Victor Caroli

Narrator (voice) (archive footage)

Paul Eiding

Hound / Ratchet / Teletraan 1 / Thundercracker (voice) (archive footage)

Corey Burton

Spike Witwicky / Shockwave / Brawn (voice) (archive footage)

Don Messick

Gears / Ratchet (voice) (archive footage)

John Stephenson

Huffer / Thundercracker (voice) (archive footage)

Scatman Crothers

Jazz (voice) (archive footage)

Christopher Collins

Starscream / Wheeljack / Laserbeak (voice) (archive footage)