Full Cast — Transformers Prime (2010–2013)

Peter Cullen

Optimus Prime (voice)

Jeffrey Combs

Ratchet (voice)

Frank Welker

Megatron (voice)

Tania Gunadi

Miko Nakadai (voice)

Josh Keaton

Jack Darby (voice)

Kevin Michael Richardson

Bulkhead (voice)

Ernie Hudson

Agent William Fowler (voice)

Andy Pessoa

Rafael "Raf" Esquivel (voice)

Sumalee Montano

Arcee (voice)

Steve Blum

Starscream (voice)

Daran Norris

Knock Out (voice)

Markie Post

June Darby (voice)

David Sobolov

Shockwave (voice)

Nolan North

Smokescreen (voice)

Michael Ironside

Ultra Magnus (voice)

Adam Baldwin

Breakdown (voice)

Clancy Brown

Silas (voice)

Tony Todd

Dreadwing (voice)

Gina Torres

Airachnid (voice)

John Noble

Unicron (voice)

Peter Mensah

Predaking (voice)

Alexandra Krosney

Sierra (voice)

George Takei

Alpha Trion (voice)

David Kaye

Hardshell (voice)