Don't look for Michelle Williams at the July 14th World Premiere of Dark Knight. According to Popcrunch, the actress is reportedly furious with the family of her late fiance, Heath Ledger, and threatening to boycott the movie opening-and all other events where the family may be present-until the Ledgers agree to provide some financial support for Heath and Michelle's young daughter, Matilda.

"Michelle is furious with Heath's family and threatening to boycott the premiere. Matilda is supposed to be the beneficiary of the will, but Michelle has seen nothing from them. Heath didn't have much in cash, but there was a big house in LA and a back-end deal for 'Dark Knight' [that] could reap millions," a spywitness reveals to the New York Post.

Heath's will was written in 2003, before Matilda was born, and subsequently left everything to his father, mother and sisters. Matilda is now considered the beneficiary, and Grandpa Kim Ledger is the executor, but Michelle fears by the time Matilda is eighteen and able to have full access to her inheritence, there will be nothing left to inherit.