Peter Cullen, 1941–2026: The Voice Was His Brother's

Peter Cullen on the red carpet at the New York premiere of Transformers: Rise of the Beasts — the last film in which he voiced Optimus Prime — at the Kings Theatre, Brooklyn, on 5 June 2023. Photo by John Angelillo/UPI. Credit: UPI/Alamy Live News.

Peter Cullen died on Wednesday at his home in Los Angeles. He was 85.

His agent confirmed the death. No cause has been given, and we are not going to speculate about one.

The statement his family released is short, and the last nine words of it are the reason this obituary is worth reading to the end.

That phrase is not a greeting-card line somebody found for the occasion. It is the exact sentence that produced the most recognisable heroic voice of the last forty years, and it was said to Peter Cullen in the 1980s by his older brother, who had every right to say it.

The brother

Captain Henry Laurence Cullen Jr. of the United States Marine Corps — Larry, to his family — served in Vietnam as a combat infantry officer with K Company, 3rd Battalion, 5th Marines, 1st Marine Division. He came home with a Bronze Star with Combat V and two Purple Hearts.

He also came home quieter. His younger brother noticed.

Years later, a casting call went out for an animated series about robots that turned into vehicles. Peter Cullen had spent two decades as a working voice man — a Montreal radio announcer, then a jobbing Hollywood professional who had been the announcer on The Smothers Brothers Comedy Hour and The Sonny & Cher Comedy Hour. He had never been asked to play a hero.

He asked Larry what a hero sounded like. The answer is the thing everybody is quoting today, and the fullest version he ever gave of it runs like this.

Then he walked into the audition. His own account of what was in the brief is very funny and entirely characteristic.

“I auditioned like everybody else. I was told it was a hero and I was told it was a truck.”

And the voice arrived. Not built, not worked up over weeks — arrived. He was, on his own telling, doing an impression of his brother.

Larry Cullen died on 25 March 2011, at White Stone, Virginia. He was 70.

Forty years of the same six words

The Transformers went out in 1984 and ran three years. Cullen voiced Optimus Prime and also Ironhide, which is the sort of thing that happened routinely in 1980s animation and would not happen now. In 1986 he did the animated film, in which the character was killed off and a generation of children learned what grief was in a cinema on a Saturday.

Then came twenty years of everything else, and this is where the range sits.

One correction worth making, because several outlets have got it wrong today. He did not voice Optimus Prime in the 2024 animated film Transformers One — that was a younger version of the character, and Chris Hemsworth played it. His last outing in the part was 2023.

“I don’t own it”

What separates Cullen from most people who get handed a franchise is that he seems to have understood, very early and without being told, that the thing did not belong to him.

He was blunt about the pressure that came with that, and unusually unbothered by it: “It’s a responsibility now, because so many people would be offended if it changed.” And about the people who kept turning up to conventions for forty years, he said something that most actors in his position would not: “I have a strong bond with them, the Generation One people. We’re equal. We’re the same.”

In 2023 he put the whole thing in one sentence, and it goes straight back to Larry.

In his own words

What is being said

At the time of writing, a few hours after the news broke, there is no statement from Hasbro, none from the Transformers franchise, and nothing yet from Frank Welker, who has been on the other side of the microphone as Megatron since 1984 and is the only person alive who could say what needs saying.

We are not going to pad this section out with anonymous posts. When the people who worked with him speak, we will add them.

What there is, in enormous volume, is the audience. That is arguably the more accurate tribute anyway: the people telling each other today that the voice their father put on to read to them was a copy of a copy of a Marine from Montreal, and that they only found that out this afternoon.

And here

There is no Irish angle to this and we are not going to manufacture one. Peter Cullen never performed in Ireland, so far as any record of his fifty-eight convention appearances shows — the closest he came was Scotland. There has been no statement from any Irish body, and there is no reason there should be.

What there is here is the same thing there is everywhere else. A generation of Irish children who watched the cartoon on Saturday mornings and the films in the Savoy, and a smaller, quieter set of them who could tell you exactly which Winnie the Pooh video had the donkey in it.

What he actually did

Voice acting is the one branch of the profession where being unrecognisable is the whole job, and Peter Cullen was better at it than almost anyone: 193 catalogued roles, sixty years, and no face attached to any of them for most of his career.

But the thing worth taking from today is smaller and harder than that.

He was handed a job in 1984 to voice a toy commercial's worth of character, and instead of doing the obvious thing — the growl, the bark, the Hollywood tough guy his brother specifically warned him against — he did something much riskier. He played a warrior who sounded kind. He did it because a man who had actually been in a war told him that was what one sounded like.

Forty years of children absorbed that as the default setting for what a hero is. It is difficult to think of a piece of voice work that has done more good, and he never once claimed the credit for it. He kept giving it to Larry.

His family have asked that people mark his death by serving their communities and leading others with compassion, integrity and loyalty. That is a strange and specific instruction to find at the bottom of a celebrity death notice, and it is worth doing what it says.

Sourcing note. Peter Cullen’s death was first reported by TMZ on 27 August 2026 and confirmed by his agent; it is reported by Variety, The Hollywood Reporter, Deadline, Forbes, Gizmodo, TheWrap and others the same day. The date of death is given as Wednesday 26 August; several outlets print 27 August, which is the date the news broke. No cause of death has been given by the family or by any authority, and we have not speculated. The family statement is quoted verbatim as carried by Gizmodo and other outlets. Biographical detail — his birth on 28 July 1941 in Montreal, the National Theatre School, and his career before 1984 — is drawn from those obituaries and from contemporaneous reporting; where a date rests only on a single source we have not printed it. The role count of 193 across 119 titles is the figure held by Behind The Voice Actors; the widely repeated “over 200” could not be sourced and we have not used it. Larry Cullen’s rank, unit, service dates, decorations and date of death are from his published obituary of July 2011 and from subsequent reporting by We Are The Mighty. Quotations from Peter Cullen are drawn from interviews given between 2006 and 2023, including to NPR, SlashFilm and Collider, and are quoted as those outlets carried them; the fullest rendering of his brother’s advice is a story he told many times over four decades rather than a single dated interview, and we have said so rather than pinning it to one occasion. He did not voice Optimus Prime in Transformers One (2024). We found no record of any Irish appearance and have not implied one. The photograph on this piece was taken by John Angelillo for UPI on 5 June 2023, at the New York premiere of Transformers: Rise of the Beasts at the Kings Theatre in Brooklyn, and is used under licence from Alamy (image 2R5XEGY); the credit line is UPI/Alamy Live News. It carries no model or property release and is used here as editorial reportage. This piece was published within hours of the news and will be updated as tributes are made.