The actor who rose to fame with "Trainspotting" and wielded a light saber as Obi-Wan Kenobi, is now starring as a '70s icon, fashion designer Halston, in a new Netflix series. Correspondent Tracy Smith talks with Ewan McGregor about how he prepared for the role; his familiarity with his character's addiction; and about returning to the "Star Wars" universe in a new TV series.

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