<Tr> <Th> Known for </Th> <Td> Voice of Optimus Prime </Td> </Tr> <Tr> <Th> Children </Th> <Td> </Td> </Tr> <P> Peter Claver Cullen (born July 28, 1941) is a Canadian voice actor . He is best known as the voice of Optimus Prime (as well as Ironhide) in the original 1980s Transformers animated series, and most other incarnations of the character, as well, and Eeyore in the Winnie - the - Pooh franchise . He also voiced Monterey Jack in Chip' n Dale Rescue Rangers from season one through some of season two . Starting in 2007, Cullen has reprised his role as Optimus Prime in related Transformers media, starting with the first live - action film . </P> <P> Cullen was born on July 28, 1941 in Montreal, Quebec, to Henry L. and Muriel (née McCann) Cullen . He has three siblings: Michaela, Sonny, and Larry . Cullen attended Regiopolis - Notre Dame Catholic Secondary School . He is a member of the first graduating class of the National Theatre School of Canada, which graduated in 1963 . His brother, Larry Cullen, was a retired Captain in the United States Marine Corps, and helped inspire the voice of Optimus Prime . </P>

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