IMDB's Transformer's page has a list of actors (Mostly just the live action actors with Cullen being the only voice actor officially listed).
Kevin Dunn .... Sparkplug Witwicky Shia LaBeouf .... Spike Witwicky Jon Voight .... Keller John Turturro .... Simmons Bernie Mac .... Bobby Bolivia (And, for some reason) Dane Cook
whomod said: I generally don't like it when people decide to play by the rules against people who don't play by the rules. It tends to put you immediately at a disadvantage and IMO is a sign of true weakness. This is true both in politics and on the internet."
