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Frequently does voice overs for commercials, cartoons, movie previews, ect. Father of Clay, Claire and Pilar E. Cullen. Has been the voice of two characters involved in chicken runs (when two cars drive towards each other). The first was the evil K.A.R.R. in the TV show "Knight Rider". The second was the heroic good guy Optimus Prime in the cartoon "The Transformers". Though he provided vocals for the inhuman alien Predator in the Predator films and the voice of Eeyore in Winnie the Pooh, he is best known for voicing the heroic Autobot leader Optimus Prime in the animated Transformers series. Though it was originally intended for his character to remain dead after being killed in the 1986 Transformers film, the death caused such a public backlash that the surprised producers brought the character back in two separate episodes of the third season (ultimately saving the world in the second appearance). Son is stuntman Clay Cullen