All Cast
Peter Cullen
Optimus Prime (voice)
Frank Welker
Megatron (voice)
Mark Ryan
Bumblebee (voice)
Patrick Hallahan
Starscream (voice)
Brian Stepanek
Blackout / Agent Simmons (voice)
Kevin Dunn
Ron Witwicky
Patrick Viall
Capt. Archibald Witwicky / Barricade / Additional Voices (voice)
