Ewan McGregor is considered one of Britain's leading actors.
His performances in cult movies such as Shallow Grave (1994) and Trainspotting (1996) and Moulin Rouge (2001) have established him as a class 'A' movie star.
The South Bank Show blows the lid off the real life of a true star and provides a fascinating insight into the workings of the film industry.
This film has been afforded an unprecedented level of access to McGregor whilst on promotional trips to Cannes and New York for two new movies - Down With Love and Young Adam.
Following him on press junkets where he can give up to 80 interviews a day, an unassuming McGregor demonstrates his skilful treatment of intrusive tabloid journalists.
In this extremely frank documentary, McGregor talks about his public fall out with the Trainspotting team who catapulted him from a virtual unknown to stardom - producer Andrew MacDonald, writer John Hodge and director Danny Boyle - after they chose to cast Leonardo Di Caprio in the lead role of The Beach.
McGregor also discusses his preparatory methods for various film roles, providing an insight in to the effects different storylines have on him.
In Trainspotting he prepared for his withdrawal scenes under the tuition of a former junkie and in the glam rock movie Velvet Goldmine, he insisted on singing all of the songs live, but in reality, nerves took over.
His solution was to get little drunk and the consequence was a full frontal nude - not a requirement of the script.
His latest movie is Young Adam, a daring Scottish independent film which recently opened at the Edinburgh Festival.
It is perhaps the most sexually explicit Scottish film ever made and is the story of an existential drifter who is involved in an accidental death and forced to face up to justice, hypocrisy, sexual addiction, and tabloid press frenzy.
Additional contributors include actor Denis Lawson, McGregor's uncle and Andrew MacDonald, John Hodge and Danny Boyle, who talk about their infamous rift with McGregor and their plans to put together a sequel to Trainspotting based on Irvine Welsh's last novel, Porno.
The South Bank Show also interviews former heroin users from the drug rehabilitation group Carlton Athletic on the hard hitting realities of drug abuse as depicted in Trainspotting and Deborah Orr from The Independent provides a polemical overview of McGregor's body of work.
Produced and directed by Susan Shaw
Edited and Presented by Melvyn Bragg