Well, only barely. SuperHeroHype.com was sent a few snapshots of what appears to be Heath Ledger as the Joker.
The pictures show Ledger walking about near his trailer in his makeup for the role. Follow this link to check out the photos.
The Dark Knight, directed by Chris Nolan with returning stars Christian Bale, Morgan Freeman, Michael Caine, Gary Oldman, Aaron Eckhart, and newcomer Maggie Gyllenhaal hits theaters on July 18, 2008.