Los Angeles: Canadian voice actor Peter Cullen, best known for lending his deep and commanding voice to Optimus Prime in the Transformers franchise, has died aged 85.
Cullen died at his home in Los Angeles on Wednesday, his agent Kevin Motley confirmed, according to The Hollywood Reporter.
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His family said he died peacefully, surrounded by loved ones and remembered by friends and fans around the world.
“Honour his remarkable legacy by serving your communities and leading others with compassion, integrity and loyalty,” the family said in a statement, urging fans to remember the message: “be strong enough to be gentle”.
Peter Cullen’s iconic Optimus Prime voice
Cullen became synonymous with Optimus Prime, the leader of the Autobots, through the original 1980s animated Transformers series.
The show followed the battle between the heroic Autobots and the Decepticons, with Cullen’s deep, authoritative delivery helping establish Optimus Prime as one of the most recognisable characters in the franchise.
After nearly two decades away from the role, Cullen returned as Optimus Prime for Michael Bay’s 2007 live-action Transformers film.
He subsequently reprised the character across several Transformers films, television productions and video games.
How his brother inspired Optimus Prime
Cullen previously revealed that the voice and personality he brought to Optimus Prime were inspired by his older brother Larry, a US Marine Corps veteran who had served in Vietnam.
He recalled being impressed by his brother’s tone, leadership and composure and said he drew on those qualities when developing the character.
Cullen described Optimus Prime as possessing a combination of calmness, gentleness, strength, honour and dignity — qualities he associated with the Marines.
That approach helped give the character a distinctive voice that became central to the identity of the Transformers franchise.
From King Kong to Predator
Cullen’s voice acting career extended well beyond Transformers.
The Montreal-born performer provided voices for the 1976 remake of King Kong and played K.A.R.R., the evil version of the Knight Automated Roving Robot, in the Knight Rider series in 1982 and again in 2009.
He was also responsible for one of the most memorable sounds in Predator. Cullen created the eerie clicking noises coming from the creature’s mouth in the 1987 Arnold Schwarzenegger film.
Earlier in his career, Cullen worked as a live-action performer and served as an announcer on The Smothers Brothers Comedy Hour and The Sonny & Cher Comedy Hour.
Cullen’s legacy
Over a career spanning decades, Cullen became one of the most recognisable voices in animation and popular culture.
While Optimus Prime remained his defining role, his work across television, film and video games established him as a major figure in voice acting.
Cullen is survived by his four children, Angus, Claire, Pilar and Clay.
Published: 27 Aug 2026, 10:33 pm IST
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