Justin Theroux: Motorcycle Man!

Justin Theroux revs the engine of his black motorcycle as he leaves a movie set on Wednesday (August 17) in Brentwood, Calif.

The 40-year-old actor visited the set to see his pal Judd Apatow, who is currently working on several new projects including This is Forty with Megan Fox and Paul Rudd.

PHOTOS: Check out the latest pics of Justin Theroux

Justin recently returned from a long vacation in Hawaii with his girlfriend, Jennifer Aniston. On his trip, Justin was spotted riding a motorcycle without a helmet.

15+ pictures inside of Justin Theroux hopping aboard his motorcycle…