Photos: Transformers come to life--at the movies

Four GM cars are being used as the basis for Transformers in the film. The Hummer H2, the Pontiac Solstice, the GMC Topkick and a new Chevrolet Camaro (shown here) that GM plans to release in 2009 will "play the part" of Bumblebee.

Photo by Paramount Pictures/Hasbro