Movie trailer.

Patrick Dempsey, who plays Dr. Derek Shepherd on Grey's Anatomy, is co-starring with Shia LeBoeuf, Josh Duhamel, and Rosie Huntington-Whiteley in the upcoming movie, "Tranformers 3: Dark of the Moon." The trailer for the film aired during Sunday's Nascar Daytona 500. Take a look below.

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Photo credit: ABC