The Wrap is reporting that Alan Tudyk, most famous for his role as Wash in Joss Whedon’s Firefly and Serenity, has been cast in Transformers 3.

Tudyk’s role is currently being kept under wraps. He joins a cast that has been rapidly increasing over the last few weeks. Patrick Dempsey, Frances McDormand and John Malkovich have all been confirmed as additions to the latest instalment in the Transformers franchise, along with regulars Shia LaBeouf and Megan Fox.

Tudyk recently starred in both Whedon’s Dollhouse and the sci-fi series V. His other big screen outings include Dodgeball, Knocked Up and I, Robot.

Principal photography for Transformers 3 is set to begin July 4. The film is scheduled for release on July 1, 2011.