AceShowbiz -

While question is mounting if Michelle Williams will attend Heath Ledger's Australian burial service, the actress is reported to have arrived in Perth with daughter Matilda Rose Ledger in tow.

The mother-daughter duo arrived in Perth today, February 6 on a Qantas flight from Los Angeles via Melbourne, it has been reported. Thus, it is widely believed that she will attend Heath's funeral, which is expected to take place later this week.

Touched down at the Perth Airport at about 3 P.M. Williams, who was dressed all in black, was seen carrying Matilda on her left hip as she entered the airport terminal amid tight security. The toddler, according to news media, clutched a white stuffed rabbit, as the pair were escorted from the terminal by another woman.

Meanwhile, results of the toxicology test which was conducted to find out the cause(s) of Heath's sudden death have been delayed. Were initially planned to be released Tuesday, February 5, the New York Chief Medical Examiner's Office in fact will not make public the details until Wednesday morning, February 6.

And while there has yet any official statement from Heath's camp concerning his burial, it is widely believed that he will be buried in a family plot next to two of his grandparents at Perth's Karrakatta Cemetery.