The new film, slated to open June 27, 2014, features an upgraded, custom-built Western Star truck as Optimus' vehicle form. Prime was a Peterbilt Model-379 for the last film, 2011's Transformers ...

Bay posts images of Optimus Prime, Autobots with shooting starting in Monument Valley “Principal photography on Transformers 4 has begun,” Bay said on his blog. “As guests of the Navajo ...