Mr. Laser Beam wrote:
Are you sure it was Ryan? Every source I've seen says it was Turturro.
According to transformerslive.blogspot.com:
Arcee - Grey DeLisle
The Fallen - Tony Todd
Jetfire - Mark Ryan
Mudflap - Reno Wilson
Skids & Wheelie - Tom Kenny
Soundwave & Devastator - Frank Welker
Sideswipe - Andre Sogliuzzo
The Doctor (Scalpel) - John DiCrosta
an ancient Prime - Kevin Michael Richardson
IMDB says that Peter Cullen has a live action role (as "Autobot Hologram") as well as Optimus Prime's voice. But where was this? I didn't see any such hologram in the film.
As is often the case with movies in production or that have just been released, IMDB is wrong.