British actor Ian McKellen, best known as Gandalf in the “The Lord of the Rings” movies and Magneto in the “X-Men” franchise, will be the subject of a feature documentary, “McKellen: Playing the Part.” The pic, directed by Joe Stephenson, is based around an exclusive 14-hour interview with McKellen. 　　The documentary will feature rare archive material of early work from stage and... (展開全部)