Claim: this is a photo of Heath Ledger (dressed as The Joker)
This is a cosplay photo of Casper Mohr by Panter on DeviantArt. Someone made a black & white version of it – and along the way someone decided it is photo of Heath Ledger. I’m sure it was not Panter’s idea to start spreading his cosplay photo with a false caption.
There are plenty of similar photos making rounds. One of my favorites:
Not one but two Jokers played by famous actors! Actually those are toys. See Hoax of fame for details.