Ledger's method acting in The Dark Knight resulted in a breathtaking performance, although it seemed to have taken a toll on his mental health. In his new book Don't Look Back, You'll Trip Over: My Guide to Life (via People ), Caine spoke about his relationship with the late actor. He mentioned his temperament, offering:

In Sir Michael Caine's new memoir, the legendary actor is full of praise for his late The Dark Knight co-star Heath Ledger, whose take on The Joker he found highly