Rough Cut 2008 on netflix

Gang-pae is #2 gangster in his organization who longs to become an actor. Su-ta is a superstar actor who takes on the role of a gangster in an action movie called Rough Cut. When another actor leaves the set due to Su-tas violent ways, the production is on the verge of shutting down. Su-ta asks Gang-pae, whom he met by chance, to play alongside him in the movie in order to save the production.