Is Tom Waits the Joker?

Kottke posted this amazing video from 1979 of an interview with Tom Waits on an Australian television show. Once you hear his delivery and watch his mannerisms I think it's more than fair to wonder if Heath Ledger stumbled across this same clip in his preparation to play the Joker in The Dark Knight.


Has anyone out there read anything that might corroborate this or is it just a really eerie coincidence?