Michelle Williams has branded rumours that there is a rift between her and the late Heath Ledger's family as "absurd".

It was recently reported that Williams is boycotting the premiere of the forthcoming premiere of The Dark Knight, which stars Ledger as The Joker, because of unknown tensions with the actor's family.

However, Williams' spokeswoman rep Mara Buxbaum said, "The presumption that Michelle ever intended to attend The Dark Knight premiere is unfounded, but to say she is 'boycotting' due to a rift with Heath's family is absurd.

"It is time to allow this family to go about their lives without this continued scrutiny and speculation."

Ledger and Williams split last year but they remained close for their daughter Matilda. Ledger died from an accidental overdose in January.