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'Transformers One' Trailer: Chris Hemsworth Voices Young Optimus Prime in the Epic Origin Story

Chris Hemsworth and Brian Tyree Henry voice the young bots that will become Optimus Prime and Megatron in the upcoming film.

ET spoke with Hemsworth and Henry at CinemaCon earlier this month, and they opened up about signing on to the Transformers franchise's first animated film in nearly four decades. According to Paramount, the film is "the long-awaited origin story of how the most iconic characters in the Transformers universe, Orion Pax and D-16, went from brothers-in-arms to become sworn enemies, Optimus Prime and Megatron." "I really joined this knowing that Chris was going to be my Optimus Prime and you just kind of play in that way 'cause you can feel the essence of who they are and then you sometimes get a chance to see what they do and you go, 'Oh I need to do this completely different,'" Henry told ET.

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