Peter Cullen. Actor: Transformers 3: Die dunkle Seite des Mondes. Peter Cullen is a Canadian-American voice actor who is widely known for voicing Optimus Prime in the Transformers franchise as well as the Michael Bay film series. He is also known for providing the vocal effects of the Predator from the 1987 film of the same name, Eeyore from Winnie the Pooh, Monterey Jack from Chip 'n Dale Rescue Rangers...