'The Dark Knight' Turns 15: How Heath Ledger Was Remembered by Christian Bale and Christopher Nolan

'The Dark Knight' cast and director Christopher Nolan reflect on Heath Ledger's role as Joker, in the wake of the actor's death from an accidental overdose in Jan. 2008, before the film was released. Christian Bale calls Ledger's performance 'phenomenal,' while Maggie Gyllenhaal notes, 'He's doing something in this movie that is extremely rare, even among the greatest actors.' The 'Oppenheimer' director reflects on helping Ledger craft the character within the world he built for 'Batman Begins.' Aaron Eckhart looks back at Harvey Dent's one-on-one moment in the hospital with Joker, admitting that he couldn't help but admire Ledger's talent while acting in scenes together. Bale makes a point to note that while Ledger immersed himself into Joker behind the scenes, without the makeup and costumes, 'he was Heath' to everyone on the set.