True Grit! A shirtless Josh Brolin, 47, sweats it out to ensure he is fighting fit with a few rounds of boxing and weightlifting in a backyard gym

Hollywood is definitely not a Country For Old Men - and Josh Brolin knows it.

The 47-year-old was making sure he stays fighting fit on Wednesday as he put himself through a gruelling workout in a makeshift gym in Santa Monica, California.

Doing his best Rocky impression, the star got his heart racing in the far from fancy sweat box, doing everything from cardio to weightlifting.

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Fight club: Josh Brolin was making sure he stays fighting fit on Wednesday as he put himself through a gruelling workout in a makeshift gym in Santa Monica, California

Fight club: Josh Brolin was making sure he stays fighting fit on Wednesday as he put himself through a gruelling workout in a makeshift gym in Santa Monica, California

The True Grit star did not slack off first starting with round after round of boxing on a heavy bag.

As he was really putting in the effort, the actor went without a shirt wearing just shorts and trainers as he was getting so hot.

Showing off his skills, the actor expertly jabbed at the bag landing every punch.

Eye of the tiger: Doing his best Rocky impression, the star got his heart racing in the far from fancy sweat box, doing everything from cardio to weightlifting

Eye of the tiger: Doing his best Rocky impression, the star got his heart racing in the far from fancy sweat box, doing everything from cardio to weightlifting

The old one, two punch: The True Grit star did not slack off first starting with round after round of boxing on a heavy bag

The old one, two punch: The True Grit star did not slack off first starting with round after round of boxing on a heavy bag

After a seemingly non-stop barrage of fast and big hits, Josh gave himself a brief breather as he took off his gloves.

Standing outside the garage/gym, the star's hard work was evident with his breadbasket far from doughy.

While not sporting a fully defined six pack, the star's shirtless physique was still impressive with his arms and chest sporting rather large muscles.

No shirt, no worries: Taking a time out and stepping away from the garage, the 47-year-old showed off his muscular physique
No shirt, no worries: Taking a time out and stepping away from the garage, the 47-year-old showed off his muscular physique

No shirt, no worries: Taking a time out and stepping away from the garage, the 47-year-old showed off his muscular physique 

Not bad: While not sporting a fully defined six pack, his stomach still had muscles albeit not his best area

Not bad: While not sporting a fully defined six pack, his stomach still had muscles albeit not his best area

Gun show: The star's shirtless body was still impressive with his arms and chest sporting  large muscles

Gun show: The star's shirtless body was still impressive with his arms and chest sporting large muscles

However, with his heart rate up and having already achieved a goods sweat, the Gangster Squad star was not done there.

No doubt the secret to his bulging pecks and biceps, Josh then hit the weights and did some bench presses.

Going it alone without a spotter, the veteran actor lifted what appeared to be an impressive 225 pounds with ease.

He's got this: No doubt the secret to his bulging pecks and biceps, Josh hit the weights and did some bench presses, lifting what appeared to be 225 pounds

He's got this: No doubt the secret to his bulging pecks and biceps, Josh hit the weights and did some bench presses, lifting what appeared to be 225 pounds

While that would be enough for most people, Josh - with his heart monitor strapped to him to record all his work - then turned to his trouble spot, if you could call a still muscular area that.

Sitting on a stability ball, the 47-year-old worked on getting that six pack doing sit ups over and over again.

Rounding out his sweat session, Josh finished with some squat presses to work out his legs and arms.

Keeping track: The actor wore a heart monitor or Fitbit so he could keep on top of his workout

Keeping track: The actor wore a heart monitor or Fitbit so he could keep on top of his workout

Troubleshooting: Sitting on a stability ball, the 47-year-old worked on getting that six pack doing sit ups over and over again

Troubleshooting: Sitting on a stability ball, the 47-year-old worked on getting that six pack doing sit ups over and over again

With no movies coming up, it seems the gruelling workout is just part of the actor's regular routine to stay in shape.

Keeping up his boxing skills at the same time is also important for the actor who often plays the hard man in his films.

Previously his impressive knock out ability has been showcased in Gangster Squad and Sin City among other films.

Almost there: Rounding out his sweat session, Josh finished with some squat presses to work out his legs and arms

Almost there: Rounding out his sweat session, Josh finished with some squat presses to work out his legs and arms

Required skill: Keeping up his boxing skills is important for Labor Day star who often plays the hard man in his films

Required skill: Keeping up his boxing skills is important for Labor Day star who often plays the hard man in his films

The actor has also shown off his ability to throw punches in a far less impressive manner during a drunken street fight.

Earning himself the nickname Brawlin' Brolin, the actor was caught on tape throwing haymakers - and missing - at a security guard at this local bar O'Brien's Irish Pub in Santa Monica in 2013.

After video surfaced, the star swore off alcohol as he had also been arrested for being intoxicated earlier in the year.

Keeping him young: Josh may also have another reason to be trying to get in great shape - he just got engaged to his much younger former assistant Kathryn Boyd (seen here last month) 

Keeping him young: Josh may also have another reason to be trying to get in great shape - he just got engaged to his much younger former assistant Kathryn Boyd (seen here last month) 

Coming soon: The 47-year-old can next be seen in film Everest which is out September

Coming soon: The 47-year-old can next be seen in film Everest which is out September

Josh may also have another reason to be trying to get in great shape - he just got engaged to his much younger former assistant Kathryn Boyd.

The couple started dating in March 2013, one month after the actor and his ex-wife Diane Lane announced they were divorcing after eight years of marriage.

As well as actress Diane, Josh was previously married to Alice Adair for six years until 1994. 

 

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