Shia LaBeouf: Shirtless Transformers Star!

Shia LaBeouf shows off his shirtless physique on the set of Transformers 3 on Thursday (October 28) in Los Angeles.

The 24-year-old actor continued to film scenes for the third installment of the popular series with co-star Patrick Dempsey.

Looks like all that Muscle Milk and long hours at the gym have paid off!

Earlier this month, Shia, who reportedly has split up with his girlfriend Carey Mulligan, shared some laughs over lunch with a mystery female friend.

10+ pictures inside of Shia LaBeouf showing off his body…