Died: 1/22/08 (28)
Cause of Death: Accidental overdose
Notable Work: 10 Things I Hate About YouA Knight's TaleThe Patriot, Brokeback MountainThe Dark Knight

Heath Ledger's fatal, accidental overdose on prescription sleep meds quickly became one of Hollywood's most infamous deaths, due largely to his hotly anticipated, previously mysterious performance as The Joker in The Dark Knight. His untimely death took the movie's pop culture significance to new heights and his winning performance earned him rave reviews and eventually a posthumous Oscar for Best Supporting Actor, displaying a level of talent that surprised even his biggest fans. A popular theory suggests that Ledger's insomnia was a result of totally immersing himself in the Joker role.