9 most dangerous movie roles in history – #6 almost got the actor killed on set (With Pics)

Heath Ledger – The Dark Knight

Many of you probably know this bittersweet story about Heath Ledger’s Joker in The Dark Knight. That last role that drove him to death. Heath spent weeks isolated from people, perfecting the laugh and mannerisms for Mr. J. Playing this role allegedly sent Ledger into a deep depression, leading to an accidental overdose on prescription medications that caused his death. Still the best Joker ever.