Ajay Devgn flashes his biceps and tattooed chest in the first poster of 'Action Jackson'

He has definitely been undergoing strenuous workout sessions at the gym to be able to flaunt his impressive physique. Action star Ajay Devgn wears shades, goes shirtless, flashes his tattooed chest and sports an angry look in the first poster of his upcoming film 'Action Jackson'. The actor tweeted the poster with a message that read, "Naa commitment, naa appointment, only punishment! And here is the first poster of #ActionJackson". Directed by Prabhudeva, the film also features Sonakshi Sinha.