Christopher Plummer, a cast member in the classic film “The Sound of Music,” arrives for a 50th anniversary screening of the film at the opening night gala of the 2015 TCM Classic Film Festival on March 26, 2015, in Los Angeles. Christopher Plummer, a cast member in the classic film “The Sound of Music,” arrives for a 50th anniversary screening of the film at the opening night gala of the 2015 TCM Classic Film Festival on March 26, 2015, in Los Angeles.