Production has begun on the highly-anticipated sequel Transformers 4 in Monument Valley, near the border of Arizona and Utah, with the first two photos revealing the latest Autobots on location. While we don't know the names of these robots in disguise yet, take a look at these photos, then read on for news about comedian T.J. Miller joining the cast.

"Transformers 4 has started production on location in Monument Valley near the border of Arizona and Utah. And this is our first look at the film's newly-designed Autobots. Pictured here: A 1,200-horsepower Bugatti Grand Sport Vitesse worth more than a whopping $2.4 million!"

"Which Autobot could this green machine be? It's a special race-inspired C7 Corvette Stingray, based on Chevrolet's upcoming 2014 production car - and the first look is seen here on the set of Transformers 4 near the border of Arizona and Utah."

It isn't known how long production will take place in Monument Valley, but shooting is also scheduled to take place in Chicago, Michigan, and China this summer. Michael Bay is directing from a screenplay by Ehren Kruger. The story reportedly revolves around an ancient Transformer menace which unleashes chaos on Earth.