...and here's the pic...this is Ledger's Joker. It looks like his self-applied lips are kind of bat symbol shaped as a jab to Batsy, and the scarring is what forms the smile. There's talk that this may not be the final final look. This could be a "left for dead" moment with the makeup applied by a 3rd party:



Nolan said they were going back to the very first Joker story in 1939 as their main inspiration for the look, and except for the scarring (which is the modern Joker), they accomplished their goal perfectly:



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