By MIKE LARKIN
Showing off his guns: The Rock humiliated his co-star Mark Wahlberg by displaying his superior biceps on the set of Pain and Gain in Miami today
And the grapple legend, real name Dwayne Johnson, made sure everyone knew it was him by striking a double biceps pose as he larked around between takes.
His famous friend Marky Mark looked like a novice in comparison as she showed off his own arm development in a tight white vest.
And while the 40-year-old former Funky Bunch frontman is a year older than The Rock, he looked like a little boy as he walked beside him as they headed to their ride.
Appropriately enough, they hopped into an American muscle car a scarlet red Pontiac Fiero.
And it seems The Departed star got his own back when it was time to hit the road, as he hopped behind the wheel while the former WWE favourite had to make do with the passenger seat.
No competition: Even when they were relaxed it was obvious which of the pair was in leaner and meaner shape
Little and large: There is little chance of Mark would risk annoying his larger castmate in case he becomes angry
Pain and Gain stars the duo as 'a couple of Florida steroid-abusing knucklehead bodybuilders who become criminals involved in an extortion ring and a kidnapping plot that goes horribly awry'.
The comedy, directed by Michael Bay, also stars Ed Harris, Ken Jeong, and Tony Shalhoub and is based on a real-life events.
In the film, a pair of Floridian bodybuilders in the 'Sun Gym Gang' get caught up in an extortion ring and a kidnapping scheme that goes terribly wrong.
Not so armless: The Rock was revelling in showing off the results of his workout regime as he prepared for the film
The film is based on the true story of steroid-abusing muscle men Daniel Lugo and Adrian Doorbal.
Studio bosses will be hoping the off-beat topic proves to be a hit with the movie-going public.
However it already has a head start, as it has a paltry budget compared to the Transformer directors usual blockbusters.
At $35 million, the film stands as Bay's lowest budgeted film since his feature film debut, the 1995 action-comedy Bad Boys.Two members of the real-life Sun Gym Gang ended up receiving death sentences and currently sit on Florida's death row.
Putting him in his place: But Marky Mark struck back by hopping behind the wheel of their muscle car
Covered up: Perhaps Mark felt intimidated by his more muscular co-star as he decided to wear a long-sleeved top
Marky Mark and the hunky bunch: The muscle car got even more muscular when the trio got in and drove off