In the 2000s, Peter Cullen began to take on more live-action roles, including his appearance in the 2007 film Transformers, directed by Michael Bay. He reprised his role as Optimus Prime in the subsequent sequels, Transformers: Revenge of the Fallen and Transformers: Dark of the Moon. It's worth noting that Cullen's voice has been so closely associated with the character that it's hard to imagine anyone else bringing Optimus Prime to life.
Cullen has also lent his voice to other notable films, including G.I. Joe: The Movie and Voltron: Fleet of Doom. His versatility as a voice actor has allowed him to take on a wide range of characters, from heroes to villains and everything in between. With a career spanning so many iconic roles, it's no wonder he's been dubbed the "voice of a generation" (or at least, that's what we're calling him).
See the cast of 'Transformers', then and now
More recently, Cullen has appeared in films like Bumblebee and Transformers: The Last Knight, cementing his status as a Transformers legend. With his distinctive voice and undeniable charm, it's no surprise that he continues to be in high demand as a voice actor. And let's be real, who wouldn't want to hire the guy who's been saving the world as Optimus Prime for decades?