Culture 3 min read By Trevor Kendall
Peter Cullen Played a Robotic Villain in This Beloved '80s Live-Action Sci-Fi Show
Before voicing Optimus Prime, Peter Cullen played KARR, a sinister robotic car, in the 1980s live-action series Knight Rider.
Long before he became the voice of Optimus Prime, Peter Cullen lent his talents to a different kind of robotic character: a sinister automobile on a beloved 1980s live-action sci-fi series. The Canadian voice actor, who died at 85, played KARR, the villainous counterpart to the heroic talking car KITT, in the hit show Knight Rider.
Cullen's role as KARR came years before he defined the heroic Autobot leader in the original Transformers animated series. In Knight Rider, KARR was a prototype artificial intelligence with a self-preservation programming that made him a dangerous antagonist. The character appeared in the show's first season and later returned in a two-part episode, giving Cullen a memorable turn as a robotic villain in a live-action setting.
Born in Montreal, Quebec, Cullen began his career in CBC comedy sketches before becoming an announcer on The Smothers Brothers television show. His voice became one of the most recognizable in entertainment history, spanning animated series, film franchises, and beloved children's programming. Beyond Optimus Prime, he voiced Eeyore in the Winnie the Pooh franchise, bringing a gentle melancholy to the gloomy donkey that resonated with generations of viewers.
Cullen's work on Transformers made him a legend among fans of 1980s animation. He reprised the role of Optimus Prime across multiple film and television franchises, including the live-action Transformers movies directed by Michael Bay. His portrayal of the noble Autobot leader was marked by a distinctive warmth and gravitas, a quality he famously attributed to his brother, a Vietnam War veteran, who advised him to be strong enough to be gentle.
His final performances included a role in the animated superhero series Invincible, where he voiced a troubled leader. That part, along with his extensive body of work, demonstrated his range as a voice actor capable of conveying both heroism and complexity. His agent, Kevin Motley, confirmed his death, though details about the circumstances were not immediately released.
Cullen's legacy is defined by his ability to find humanity in characters that were not human at all. Whether he was voicing a heroic alien robot, a depressed donkey, or a menacing artificial intelligence, he brought a depth of emotion that made audiences care. His passing marks the end of an era for voice acting, a craft he helped elevate to an art form.
Fans and colleagues alike have remembered him for his kindness and professionalism, as well as for the iconic line associated with Optimus Prime: «Remember be strong enough to be gentle.» That sentiment, drawn from his own family history, became a guiding principle for his most famous character and a touchstone for the fans who grew up with his voice.
