Canadian voice actor Peter Cullen, best known for voicing the heroic Optimus Prime across numerous ‘Transformers’ films, TV shows and video games, as well as the gloomy Eeyore in several ‘Winnie the Pooh’ projects, has died at the age of 85.

Peter Cullen, age 85, has passed away, the actor most famous for voicing the lead Transformer, Optimus Prime, for over 40 years.

Peter Cullen joins a gorwing list of entertainment industry losses just this month, including Hayden Panettiere, Yayoi Kusama and Dolly Parton.