Optimus Prime, known in Japan as Convoy, is a character from the "Transformers" franchise. Prime is the leader of the Autobots, a group of transforming robots from the planet of Cybertron. The Autobots are constantly at war with another group of transforming robots called Decepticons. According to Bob Budiansky, co-writer of the Transformers series, Dennis O'Neil made his name. In the 1986 animated film Transformers: The Movie, he is killed by his arch nemesis Megatron, who is the leader of the Decepticons. He is voiced by Peter Cullen.