Frank Welker
Megatron / Mirage / Rumble / Skywarp / Soundwave (voice)
Acting
Gregg Berger
Cliffjumper / Narrator / Spike Witwicky / additional voices (voice)
Acting
Peter Cullen
Optimus Prime / Ironhide (voice)
Acting
Frank Todaro
Starscream / Wheeljack / Reflector / Sparkplug Witwicky (voice)
Acting
Arif S. Kinchen
Jazz (voice)
Acting
Dan Gilvezan
Bumblebee / Shockwave (voice)
Acting
Michael Bell
Prowl (voice)
Acting
Victor Caroli
Narrator (archive audio)
Acting
Paul Eiding
Hound / Ratchet / Teletraan 1 / Thundercracker (voice)
Acting
Corey Burton
Spike Witwicky / Shockwave / Brawn (archive audio)
Acting
Don Messick
Gears / Ratchet (archive audio)
Acting
John Stephenson
Huffer / Thundercracker (archive audio)
Acting
Scatman Crothers
Jazz (archive audio)
Acting
Christopher Collins
Starscream / Wheeljack / Laserbeak (archive audio)
Acting
Casey Kasem
Cliffjumper / Bluestreak / Teletraan 1 (archive audio)
Acting