The world was shocked and saddened when Heath Ledger passed away in January. But with the release of The Dark Knight, his last completed film, Heath has the chance to shine again. Perhaps the greatest role of his career, Heath's Joker is depraved, maniacal, and flat-out creepy. His performance will haunt you well after you leave the theatre. What was it like to work with such an undeniable talent? We went straight to the source -- Heath's Dark Knight co-stars and director -- to find out.

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