LOS ANGELES, 28 August 2026 — The voice behind two generations of beloved characters has fallen silent.
Canadian voice actor Peter Cullen, best known as the legendary voice of Optimus Prime in Transformers and the unmistakably gloomy Eeyore in Winnie the Pooh, has died at the age of 85.
Cullen died Wednesday at his home in Los Angeles, according to his agent Kevin Motley, with his family confirming that he “passed away peacefully, surrounded by his loving family — and held in the hearts of his many friends and countless fans worldwide.”
His family asked fans to honour his legacy by serving their communities and leading with “compassion, integrity and loyalty,” while remembering his words: “Be strong enough to be gentle.”
For automotive and pop-culture fans, Cullen’s most enduring legacy will forever be tied to Optimus Prime — the noble leader of the Autobots whose commanding voice became one of the defining sounds of the Transformers franchise.
THE VOICE THAT DEFINED OPTIMUS PRIME
Born Peter Claver Cullen in Montreal on July 28, 1941, Cullen was one of four children and graduated from the National Theatre School of Canada in 1963.
After working in radio, television and live-action comedy, he found his calling in voice acting.
When he auditioned for The Transformers animated series in the 1980s, Cullen initially admitted that he was puzzled by the character.
“I auditioned like everybody else,” he recalled in a 2014 NPR interview. “I was told it was a hero, and I was told it was a truck.”
That truck would become one of the most recognisable characters in pop culture.
Cullen first voiced Optimus Prime in the original The Transformers animated series, which ran from 1984 to 1987. His deep, authoritative delivery gave the Autobot leader a sense of strength, wisdom and compassion that would remain inseparable from the character.
His interpretation of Optimus Prime was also deeply personal.
Cullen revealed that he based the character’s voice and personality partly on his older brother Larry, a decorated U.S. Marine who served in Vietnam.
“When he came home, I could see a change. He was quieter and he was a man and a superhero to me,” Cullen said in 2006.
“That voice just came right out of me, and I sounded like Optimus.”
FROM CARTOONS TO THE BIG SCREEN
Cullen’s Optimus Prime became such an integral part of the franchise that audiences demanded his return after the character’s controversial death in The Transformers: The Movie in 1986.
Two decades later, when Michael Bay brought Transformers to cinemas in 2007, Cullen returned to the role.
He continued as Optimus Prime through Transformers: Revenge of the Fallen (2009), Dark of the Moon (2011), Age of Extinction (2014), The Last Knight (2017), Bumblebee (2018) and Rise of the Beasts (2023).
The 2007 film alone grossed more than US$700 million worldwide, while several of its sequels crossed the US$1 billion mark.
For Cullen, returning to the role after decades away felt surprisingly natural.
“I describe it as kind of slipping into an old pair of very comfortable shoes that you haven’t worn for a while,” he told IGN in 2007.
“I just slipped right into them, and they felt as good as the last time I put them on.”
EEYORE, K.A.R.R. AND THE PREDATOR
But Cullen’s career extended far beyond Optimus Prime.
He became the voice of Eeyore beginning with The New Adventures of Winnie the Pooh in 1988, bringing the melancholy donkey to life for decades across television specials, films and other projects.
His other memorable roles included Monterey Jack in Chip ‘n Dale Rescue Rangers, Coran and King Alfor in Voltron, and K.A.R.R. — the sinister robotic counterpart to KITT — in Knight Rider.
He also voiced King Kong in the 1976 remake.
One of his most unusual contributions came in 1987’s Predator.
Cullen created the creature’s disturbing clicking, bubbling and crackling vocalisations after being shown the Predator’s appearance and drawing inspiration from the image of an upside-down horseshoe crab dying on a beach.
The result became another instantly recognisable sound in cinematic history.
A LEGACY BEYOND THE MICROPHONE
Cullen’s career began long before Optimus Prime, including work as an announcer and live-action performer on programs such as The Smothers Brothers Comedy Hour and The Sonny & Cher Comedy Hour.
His voice work eventually earned him a Daytime Emmy nomination for Transformers: Prime.
He also maintained an association with NASA and the Optimus Prime Spinoff Award, which recognises young people pursuing studies in science, technology, engineering and mathematics.
Yet perhaps the most fitting measure of Cullen’s legacy is the emotional connection audiences formed with his characters.
Optimus Prime represented courage, leadership and sacrifice.
Eeyore represented vulnerability, melancholy and quiet resilience.
And both became beloved because of the humanity Cullen brought to them.
“The phenomenon of Transformers itself is mind-shaking,” Cullen once said.
“Being a part of it is not only historical, it’s a part of your life that says, ‘Gee, I’m glad.’”
For millions of fans who grew up hearing his voice, that gratitude will be mutual.
Peter Cullen didn’t simply voice Optimus Prime. He helped define what Optimus Prime sounded like — and, for generations of fans, what a hero sounded like.
He leaves behind his children Angus, Claire, Pilar and Clay.
