Animated (2007-2009)

y Susan Blu - Arcee - 98 (before this role)
y David Kaye - Optimus Prime, Lugnut, Grimlock, Warpath, Cliffjumper, Highbrow - 97, 98, 03, 07, 08, 09, 11, 12
y Kevin Michael Richardson - Omega Supreme - 11
y Bumper Robinson - Bumblebee, Blitzwing, Blackout, Porter C Powel - 08
y Tara Strong - Sari, Slipstream, Strika, Red Alert, Slo-Mo - 08
y John Moschitta - Blurr - 00 (before this role)
y Weird Al Yankovic - Wreck-Gar - 09

n Jeff Bennett - Prowl, Ultra Magnus, Mixmaster, Soundwave, Angry Archer, Captain Fanzone
n Corey Burton - Megatron, Ratchet, Shockwave, Brawn, Ironhide, Longarm Prime, Colossus Rhodes
n Towsend Coleman - Sentinel Prime
n Bill Fagerbakke - Bulkhead, Hot Shot, Master Disaster
n Lance Henriksen - Lockdown
n Tom Kenny - Starscream, Scrapper, Isaac Sumdac, Skywarp, Sunstorm, Thundercracker, Ramjet, Clones, Waspinator/Wasp, Jetfire
n Phil LeMarr - Jazz, Jetstorm, Alpha Trion, Oil Slick, Omega Supreme
n John Mariano - Dirt Boss
n Judd Nelson - Rodimus Prime
n Alexander Polinsky - The Headmaster
n Brian Posehn - Nanosec
n Kath Soucie - Professor Princess
n Peter Stormare - Meltdown
n Cree Summer - Blackarachnia, Elita-1
n Electronic speech synthesizer (PlainTalk) - Perceptor
n George Takei - Yoketron
n Fred Willard - Swindle

Prime (2010-2013)

y Steve Blum - Starscream, Bombshock - 11, 13
y Jeffrey Combs - Ratchet - 11
y Peter Cullen - Optimus Prime, Nemesis Prime - 97, 04b, 06, 07, 09, 10, 11, 12
y Tania Gunadi - Miko - 11
y James Horan - Wheeljack - 13
y Ernie Hudson - Agent Fowler - 11
y David Kaye - Hardshell - 97, 98, 03, 07, 08, 09, 11, 12
y Josh Keaton - Jack, Tailgate - 11
y Andy Pessoa - Raf - 11
y Markie Post - June Darby - 11
y Kevin Michael Richardson - Bulkhead, Makeshift, Nemesis - 11
y David Sobolov - Shockwave - 13

n Adam Baldwin - Breakdown
n Clancy Brown - Silas
n Richard Green - Skyquake
n Michael Ironside - Ultra Magnus
n Dwayne The Rock Johnson - Cliffjumper
n Peter Mensah - Predaking
n Sumalee Montano - Arcee
n John Noble - Unicron
n Daran Norris - Knock Out
n Nolan North - Smokescreen
n George Takei - Alpha Trion
n Tony Todd - Dreadwing
n Gina Torres - Airachnid
n Frank Welker - Megatron


Rescue Bots (2011-2013)

y Steve Blum - Heatwave - 11, 13
y Parvish Cheena - Blades - 13
y Peter Cullen - Optimus Prime - 97, 04b, 06, 07, 09, 10, 11, 12
y DC Douglas - Chase, Mr Harrison - 13
y Elan Garfias - Cody Burns - 13
y Maurice LaMarche - Chief Charlie Burns, MorBot - 13
y Jason Marsden - Kade Burns, Milo, Robo-Baby - 13
y Shannon McKain - Graham Burns - 13
y Imari Williams - Boulder - 13
y Diamond White - Frankie Greene - 13

n Jeff Bennett - Mayor Luskey, Huxley Prescott
n LeVar Burton - Doc Greene, Dither, Trex
n Lacey Chabert - Dani Burns
n Kath Soucie - Professor Anna Baranova