Michael Bay has posted up information regarding the voice actors for Transformers Age of Extinction.

“I am pleased to welcome two gifted and versatile actors, John Goodman and Ken Watanabe, to the world of Transformers. And to reteam with Peter and Frank, who have brought Transformers characters alive from the beginning. I’ve been fortunate to work with some of the best voice talent in the business, and together we will introduce several exciting new robots to fans of the franchise around the world.”

Golden Globe winning actor John Goodman (The Big Lebowski) and Oscar nominated actor Ken Watanabe (Inception, Godzilla) will join the voice cast of the movie as Hound and Drift, alongside some returning voice actors, such as Peter Cullen, Frank Welker, John DiMaggio, Mark Ryan, Robert Foxworth and Reno Wilson.
DiMaggio (voice of Leadfoot from Dark of the Moon) will provide the voice of Crosshairs, while Mark Ryan (Bumblebee, Jetfire) will take the throne from Lance Henriksen as the voice of Lockdown. Welker will be the voice of Galvatron and Foxworth and Wilson will reprise their roles as Ratchet and Brains