AUTOBOTS

OPTIMUS PRIME: The Autobots' leader - alternate form: Peterbilt truck.

IRONHIDE: Weapons specialist - GMC Topkick.

RATCHET: Medic - Hummer H2.

BUMBLEBEE: Friend and mode of transportation for Sam Witwicky (Shia LaBeouf) - 2010 Chevorlet Camaro.

ARCEE: A female Autobot - motorcycle.

SIDESWIPE: A Lamborghini in the toy line, here he transforms into a silver Corvette Stingray concept car.

JETFIRE: An older Decepticon who switches sides - SR71 Blackbird jet.

JOLT: The original toy was a Decepticon, but in the movie he's a good guy - Chevrolet Volt plug-in hybrid.

SKID & MUDFLAP: a.k.a. "The Twins" - Chevrolet Beat and Trax concept cars.