Peter Cullen, the iconic voice behind Optimus Prime and Eeyore, died from cardiac arrest at his Los Angeles home on August 26, according to his death certificate. The document also lists respiratory arrest and several other significant health conditions, including cerebellar metastasis, hypoxia and chronic obstructive pulmonary disease. Cullen was 85 and had spent decades voicing Optimus Prime, first taking on the role in the original Transformers animated series in 1984. His family said he died peacefully surrounded by loved ones, while asking fans to honor his legacy through compassion, integrity and service. #petercullen #celebrity #optimusprime #transformers