The Wrap is reporting that actor Alan Tudyk, best known for his role on Joss Whedon’s beloved TV shows "Firefly" and "Dollhouse," has joined the eclectic cast of Michael Bay’s Transformers 3 in an unspecified role.

Tudyk is the latest announcement in what’s looking to be a diverse cast with John Malkovich, Frances McDormand and Patrick Dempsey having already joined the returning cast. Previously, Tudyk appeared in the original Death at a Funeral, 3:10 to Yuma, Judd Apatow’s Knocked Up and Whedon’s "Firefly" spin-off Serenity. At this point, nothing else is known of the plot for the threequel or what part Tudyk might play.

Transformers 3 is scheduled to open on July 1, 2011.