Mark Renton is a fictional character from the novel "Trainspotting," written by Irvine Welsh. He is portrayed as a young man living in Edinburgh, Scotland, who struggles with heroin addiction. Renton is often seen as the anti-hero of the story, navigating the challenges of addiction and the impact it has on his relationships and life choices. In the 1996 film adaptation directed by Danny Boyle, Renton is played by actor Ewan McGregor. The character's journey reflects themes of escapism, friendship, and the harsh realities of drug culture. Renton's internal conflicts and desire for a better life resonate with many, making him a memorable figure in contemporary literature and cinema.