Peter Cullen, the Canadian voice actor whose deep, measured delivery made Optimus Prime one of the most recognised voices in the history of popular entertainment, died Wednesday at his home in Los Angeles. He was 85. His agent Kevin Motley confirmed the death, with Cullen’s family saying he “passed away peacefully, surrounded by his loving family — and held in the hearts of his many friends and countless fans worldwide.”
Cullen voiced Optimus Prime — the heroic leader of the Autobots — from the character’s debut in the 1984-87 syndicated animated series The Transformers through to Rise of the Beasts in 2023, a run spanning nearly four decades. He also originated the voice of Eeyore in The New Adventures of Winnie the Pooh in 1988, created the iconic clicking sounds of the Predator in the 1987 Arnold Schwarzenegger film, and voiced King Kong in the 1976 remake.
The family asked that people honour Cullen’s legacy by “serving your communities and leading others with compassion, integrity and loyalty” and to “always remember: ‘be strong enough to be gentle'” — words that could have come from Optimus Prime himself.
How Optimus Prime Became a Cultural Icon
Cullen won the Optimus Prime role by audition, initially uncertain what to make of the brief. “I was told it was a hero, and I was told it was a truck,” he said in a 2014 NPR interview. The voice that emerged — authoritative, warm, and carrying an undercurrent of genuine courage — was inspired by his older brother Larry, a decorated US Marine who served in Vietnam from 1965 to 1968.
“When he came home, I could see a change. He was quieter and he was a man and a superhero to me,” Cullen recalled. “I watched him and listened to him. I’d never had an opportunity to do a superhero, and when that came, that voice just came right out of me, and I sounded like Optimus.”
The character’s death in The Transformers: The Movie (1986) produced an outcry so significant from young audiences that producers brought Cullen and Prime back for a straight-to-video follow-up. When Michael Bay revived the franchise for DreamWorks in 2007, rehiring Cullen was considered a non-negotiable. Cullen described returning to the role after more than two decades as “slipping into an old pair of very comfortable shoes.” The 2007 film grossed $709.7 million globally. Its sequels each performed similarly, with Revenge of the Fallen earning $836.3 million and both Dark of the Moon and Age of Extinction topping $1.1 billion.
A Career That Stretched Across Decades
Cullen was born Peter Claver Cullen in Montreal on July 28, 1941. He graduated from the National Theatre School of Canada in 1963, studied opera-influenced acting, performed Shakespeare in Stratford, Ontario, and worked in repertory theatre in Toronto before heading to Hollywood. His early live-action career included announcer roles on The Smothers Brothers Comedy Hour and The Sonny & Cher Comedy Hour.
Beyond Optimus Prime and Eeyore, Cullen voiced an extraordinary range of characters across animation and film. He played the villain K.A.R.R. on Knight Rider in 1982 and 2009; Monterey Jack in Chip ‘n Dale Rescue Rangers; and Mario in Saturday Supercade, among many others. His performance in Transformers: Prime earned a Daytime Emmy nomination. He was also involved with NASA’s Optimus Prime Spinoff Award, presented annually to young people studying space, science, technology, and mathematics.
Cullen is survived by his children Angus, Claire, Pilar, and Clay, a stunt performer and coordinator.
“The phenomenon of Transformers itself is mind-shaking,” Cullen said in one of his final reflective interviews. “Being a part of it is not only historical, it’s a part of your life that says, ‘Gee, I’m glad.’ I did something in my life that stood out, and I’m really grateful for that. Humbled by it.”
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