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Peter Cullen, the Montreal-born voice of Optimus Prime and Eeyore, died Aug. 26, 2026 at his Los Angeles home. He was 85. His agent confirmed the news.
Peter Claver Cullen died on Wednesday, 26 August 2026, at home in Los Angeles. He was 85. Agent Kevin Motley confirmed the death to The Hollywood Reporter, Variety, and CBC News. A cause has not been made public. The family said he died peacefully, surrounded by relatives, and asked that people remember a line he had been repeating at conventions for years: be strong enough to be gentle.
‘Transformers’: Peter Cullen and Frank Welker on the Evolution of Optimus Prime and Megatron https://t.co/1b9GnTDVXG
— Peter Cullen FP (@cullenisprime) September 20, 2017
That sentence is the whole career in eight words. Cullen spent four decades as Optimus Prime in the Hasbro Transformers line, from the 1984 syndicated cartoon through Paramount’s live-action films ending with Transformers: Rise of the Beasts in 2023. He spent nearly three of those decades as Eeyore for Disney. The same throat did the clicks inside the mask in Predator (1987), the ape in the 1976 King Kong, KARR on Knight Rider, Monterey Jack on Chip ’n Dale: Rescue Rangers, and, late, Thaedus on Invincible. The face was never the product. The product was control.
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Cullen was born in Montreal on 28 July 1941, one of four children of Henry L. Cullen and Muriel Margaret McCann. The family line was Irish. He spent summers on a relative’s farm and later told interviewers he learned cows, calves, chickens, and dogs before he learned a booth. School was Regiopolis-Notre Dame in Kingston, Ontario. Training was the first graduating class of the National Theatre School of Canada in 1963. Repertory work followed at Toronto’s Crest Theatre.
Radio came first as a paying instrument. Montreal’s CKGM was an early stop. American variety television was the next one. He announced and sketched on The Smothers Brothers Comedy Hour from 1967 to 1969, then turned up on The Sonny & Cher Comedy Hour and The Hudson Brothers Razzle Dazzle Comedy Show. The face work never made him a leading man. The voice work made him a fixture in Los Angeles session rooms by the early 1980s: villains, narrators, monsters, animals, the jobs that do not need a close-up.
French-Canadian children’s programs sat in the early credit list. So did Marvel cartoon parts, including Mysterio on Spider-Man and His Amazing Friends. The pattern was volume. Behind The Voice Actors logs more than 200 credited roles across 140-plus titles. That database is a fan ledger, not a union contract, but the shape is right. Cullen was the name a casting director called when a show needed authority without shouting, or sadness without syrup.
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The Transformers audition, as Cullen told it for forty years, was almost a joke on paper. He drove to a Burbank casting house. The brief said hero. The brief also said truck. His older brother Larry, a retired captain in the United States Marine Corps who had served in Vietnam from 1965 to 1968, gave him the note that became house lore. Do not be a Hollywood hero. Be a real one. Real heroes do not yell and act tough. They are tough enough to be gentle. Control yourself.
Cullen read the copy in Larry’s register. Soft advisory tone, not a bark. He later said he walked to the car wishing Larry had been in the room. Agent Steve Tisherman called with two bookings, not one: Optimus Prime and Ironhide. The 1984 series The Transformers, produced with Marvel Productions and Toei, then AKOM, put that voice on weekday afternoons next to a Hasbro toy aisle. Children did not know the Marine story. They knew the cadence. “Freedom is the right of all sentient beings” only works if the speaker sounds like he has already paid for the sentence.
Cullen kept saying, in panels and in a 2014 NPR conversation, that he had not understood the size of the part until after the fact. Fan mail was not forwarded. He found out how large Optimus had become when the 1986 feature killed the character and the mail, finally, arrived as anger.
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The Transformers: The Movie opened in 1986 and cut Optimus Prime down in the first act so a new toy line could take the shelf. The backlash was immediate. Producers reversed course. Season three’s two-parter “The Return of Optimus Prime” put Cullen back in the booth. The 40th anniversary of that film is on a short theatrical window in mid-September 2026, a booking that now reads as memorial rather than merchandising.
Other actors held the part in the gaps. Neil Kaplan voiced a different Optimus in Robots in Disguise (2001–2002). Cullen was not a permanent lock until Michael Bay and Paramount put the property into live action in 2007. Producer Lorenzo di Bonaventura later said there was no discussion of the role without Cullen unless Cullen declined it. He did not decline. He voiced Prime in the 2007 film and in 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).
He did not voice the younger Orion Pax in 2024’s animated Transformers One. That part went to Chris Hemsworth. Cullen’s last film as Prime remains the 2023 feature. He still appeared as the voice on a 2024 episode of Fox’s The Masked Singer. He still sat panels. TFcon Los Angeles in 2026 put him next to Frank Welker, the longtime Megatron, for a 40th-anniversary Q&A. The booth work had slowed. The public voice had not.
Hasbro inducted him into the Transformers Hall of Fame at BotCon 2010, one of the first humans in that room. In 2014 he left handprints outside the TCL Chinese Theatre when Age of Extinction hit home video. Optimus left a tire print. In 2023 he received a Children’s and Family Emmy Lifetime Achievement Award from NATAS. Work on Transformers: Prime (2010–2013) brought Daytime Emmy attention. Some roundups call that a win, others a nomination. The safer line is the one the trades used this week: the series put him back on a ballot.
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Disney needed a donkey in 1988. Ralph Wright had set the original featurette Eeyore. Ron Gans had the part on Welcome to Pooh Corner. Cullen took The New Adventures of Winnie the Pooh (1988–1991) and kept coming back. The list is long because Disney’s Pooh machine is long: Pooh’s Grand Adventure, The Tigger Movie, A Very Merry Pooh Year, Piglet’s Big Movie, Springtime with Roo, Pooh’s Heffalump Movie, The Book of Pooh, My Friends Tigger & Pooh, a House of Mouse stop, a later Doc McStuffins crossover in 2017. One tally counts 42 productions across 29 years. The succession boxes put him as the primary Eeyore from 1988 to 2017.
He was not the only Eeyore in those decades. Brad Garrett, Bud Luckey, Gregg Berger, and others covered films and games when Disney split the labor. Cullen still treated the donkey as the second favorite job, after Prime. He told NPR the pleasure was simple. He would drop into “Hello. Thanks for noticing me.” Children’s faces changed. That, he said, was one of the great joys.
At a 2018 TFcon panel he sketched the difference from the cowboy-tinged Eeyore he had inherited. His version was slower and sadder. Same man. Different budget of breath.

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Before the truck and the donkey, Cullen was already a sound. He voiced the ape in John Guillermin’s 1976 King Kong. In 1987, at his agent’s push, he went in on Predator and supplied the clicks, rattles, and throat work that sit under the mask. He later reprised alien vocalizations in games. On live-action television he was the first voice of KARR, the homicidal counterpart to KITT, on Knight Rider.
Animation kept him in weekly rotation. Monterey Jack on the first stretch of Chip ’n Dale: Rescue Rangers. Captain Flint in Treasure Planet. Announcer work for Cartoon Network’s Toonami block, the job a generation of action-cartoon viewers heard every afternoon without attaching a name. In 2021 he turned up as Great Thaedus, the Viltrumite who breaks with empire, on Amazon’s Invincible. The filmography still has to be closed by a studio ledger, not a trending page.
Convention culture became a second booth. Cullen did not hide from fans. He brought a Matrix of Leadership toy to tables. He did the Prime voice and the Eeyore voice in the same hour. Welker was the regular foil. The two of them had been on opposite sides of the Autobot and Decepticon war since the first season, and the panels in 2026 still ran on that contrast: two old session men who had outlived the toy aisle that hired them.
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The family statement, carried by the trades, asked for a specific kind of memorial. Serve communities. Lead with compassion, integrity, and loyalty. Remember “be strong enough to be gentle.” That is Larry’s advice, quoted back at the world two days after the death. Cause of death remains unreleased as of 28 August 2026. Cullen is survived by four children and, per some Canadian notices, three grandchildren. Daughter-in-law Molly Culver appears on the public family tree. Larry, the Marine, is the relative the obituaries cannot skip.
Social accounts attached to his name need a caution. @itspetercullen on Instagram presents as the actor and carries the Montreal birth date, but posting history includes long gaps and fan-style captions. Treat it as unverified until the estate says otherwise. @cullenisprime on X states in its own bio that it is a fan site, not Cullen. No official verified X for the man himself turned up in a 28 August check. The reliable paper trail is Motley, the family statement, IMDb, the National Theatre School record, Hasbro’s Hall of Fame line, and the studio credits.
Paramount and Hasbro have a new Transformers script in motion, Jason Fuchs attached, meant to continue after Rise of the Beasts. How that film treats Prime’s voice is not a question this desk can answer. Cullen’s last locked film performance as the character is 2023. Hemsworth already covers the origin story. The 1984 cadence is now an archive.
What remains audible is the split he managed for most of a working life. A truck that refused to shout. A donkey that refused to cheer up. A Marine brother’s instruction sitting under both. The work ended on a Wednesday in Los Angeles. The recordings do not.


