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Peter Cullen’s Cause of Death Determined

The death certificate cites cardiac arrest and lung cancer, while fellow voice actor Frank Welker remembered Cullen’s legacy as Optimus Prime.

  • On Thursday, voice actor Peter Cullen's cause of death was revealed as cardiac arrest with respiratory arrest as an underlying cause, following his passing at his Los Angeles home on August 26.
  • Cullen was best known for voicing Optimus Prime in Transformers and Eeyore in Disney's Winnie the Pooh franchise, while also creating creature sounds for the 1987 Arnold Schwarzenegger film Predator.
  • In a 2014 NPR interview, Cullen explained he channeled the spirit of his older brother Larry, a decorated Marine who served in Vietnam, to develop his iconic superhero voice for Optimus.
  • His family asked fans to honor his legacy by serving communities with compassion, while longtime collaborator Frank Welker, who voiced Megatron, paid tribute to their creative partnership and shared values.
  • He is scheduled to be buried at Forest Lawn on September 9, and will make a final appearance as Optimus Prime in the upcoming project Optimus Prime: Awakening opposite Welker.
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The cause of death of Peter Cullen, the Canadian actor best known for voicing Optimus Prime in the “Transformers” films, has been revealed. The actor died a few days ago at the age of 85. According to the death certificate, which was obtained by TMZ, his death was attributed to cardiac arrest caused by pulmonary failure. The underlying cause of death The certificate also lists malignant neoplasm of the lower lobe of the lung as the underlying ca…

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The Canadian actor had, among other things, lent his voice to Optimus Prime in the Transformers films.

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Peter Cullen’s cause of death determined

Cause of death revealed for Transformers star Peter Cullen, who passed away due to respiratory arrest.

·Seattle, United States
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TMZ broke the news in Burbank, United States on Wednesday, September 2, 2026.
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