The image also appears to show that bald-headed Dwayne will sport a wig to play the Greek demigod in Hercules: The Thracian Wars, due for release in July 2014.
When it comes to the biggest stars in Hollywood, few can beat The Rock in terms of literal size.
And it seems The Rock has upped his muscle even more for his role in the upcoming Hercules movie, judging by his incredible physique in pictures posted on his Twitter over the past week.
The first image shows the 41-year-old actor grimacing in pain while pulling down weighted cables to work on his upper arm muscles.
No pain, no gain! The Rock grimaces in pain as he works on his famous muscles in between takes on the set of his new Hercules movie
The Rock, whose real name is Dwayne Johnson, flexes his body and displays his large and intricate tattoo across his chest, shoulder and arm.
Another frame shared by the actor shows just his bulging bicep, complete with fake scars, as he sits in the hair and make-up trailer.
That's just his ARM! Another snap shows the muscle man's bulging bicep and his long-haired wig
Leg day: The Rock, real name Dwayne Johnson, clearly doesn't hold back when it comes to his workouts
Brett Ratner is directing the film, which is also set to star Rufus Sewell as Autolycus, the son of Olympian god Hermes.
Dwayne's career is going from strength to strength, and the actor has recently appeared in movies such as G.I. Joe: Retaliation, in which he appears with Bruce Willis, and Fast & Furious 6, which also features Vin Diesel.
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