The boys at IGN have tracked down George Clooney and it seems that, no, he will not be the voice of Optimus Prime in the upcoming Transformers movie. In fact, according to the actor, no one has even mentioned it to him. I have to say I'm not real disappointed. Clooney's voice isn't right for Optimus Prime. Perhaps Vin Diesel? Hey, he played a robot in The Iron Giant, so I don't think Optimus Prime would be too much of a stretch. Who do you think would be the best choice to vocalize the Autobot leader?