Peter Claver Cullen (born July 28, 1941) is a Canadian voice actor. He is notable for voicing Optimus Prime in the original 1980s Transformers animated series, returning to role in Transformers media in 2007, starting with the first live-action film. He has also voiced many other characters across a wide variety of popular media, including Eeyore in the Winnie the Pooh franchise, Monterey Jack in Chip 'n Dale Rescue Rangers, the first voice of KARR in Knight Rider and the vocalizations of the title character in Predator.

Early life
Cullen was born on July 28, 1941, in Montreal, Quebec, to Henry and Muriel (née McCann) Cullen. He is of Irish descent. He has three siblings: Michaela, Sonny, and Larry. He is a member of the first graduating class of the National Theatre School of Canada, which he 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.