28/08/2026
Peter Cullen, Voice of Optimus Prime, Dies at 85
Peter Cullen, the Canadian actor whose distinctive voice brought Optimus Prime and Eeyore to generations of audiences, has died aged 85.
Cullen died on Wednesday at his home in Los Angeles, according to a statement.
His most recognisable role came in 1984, when he began voicing Optimus Prime, the honourable leader of the Autobots, for the Transformers television series. He continued in the role for decades, returning for seven Transformers films released between 2007 and 2023, as well as other projects connected to the franchise.
For many audiences, Cullen’s work was equally memorable for a very different character. He voiced Eeyore, the melancholy donkey from the Winnie the Pooh universe, beginning with The New Adventures of Winnie the Pooh in the late 1980s. He later returned to the character across related television programmes, films and games.
Cullen’s voice work extended well beyond those two roles.
He provided the roars of King Kong for the 1976 film remake and voiced KARR, the villainous counterpart to KITT, in Knight Rider in 1982 and again in 2009.
He also helped create one of Predator’s most distinctive sounds. Cullen was credited with developing the eerie clicking noises produced by the creature in the 1987 Arnold Schwarzenegger film.
Born in Montreal, Cullen began his career in Canadian television and radio before appearing on programmes including The Sonny & Cher Show and The Smothers Brothers Comedy Hour. He eventually focused his career on voice acting.
The voice he created for Optimus Prime was influenced by his older brother Larry Cullen, a retired US Marine Corps captain who had served in the Vietnam war.
Cullen recalled that Larry encouraged him to approach Optimus Prime as a genuine hero rather than a stereotypical Hollywood character. His advice was that the character should be strong enough to be gentle.
That idea stayed with Cullen throughout his performance.
He later recalled being initially puzzled by the audition, saying he had been told the role was for a hero and that the hero was a truck.
Cullen’s portrayal eventually became one of the defining voices of the Transformers franchise. His work earned him a Daytime Emmy nomination for outstanding performer in an animated programme in 2011, and he received a lifetime achievement award at the Children’s & Family Emmy Awards in 2023.
When Transformers returned to the big screen in 2007 under director Michael Bay, Cullen reprised Optimus Prime alongside a new generation of performers, including Shia LaBeouf.
He described returning to the character as being like putting on an old, comfortable pair of shoes again.
Cullen’s family said he died peacefully surrounded by his loved ones and remembered him as someone whose legacy should be honoured through compassion, integrity and service to others.
For audiences who grew up with Transformers, Winnie the Pooh and countless animated productions, his legacy is likely to be heard as much as remembered.