McGregor will star as the title character, also known as Roy Halston Frowick, a pioneering American fashion designer of the 1960s and '70s. Of course, McGregor is one of Hollywood's big stars, with a wide and diverse resume. His next project is one that many have been waiting a long time for: he's reprising his role as Obi-Wan Kenobi for a Disney+ Star Wars TV series.