A spokeswoman for New York's medical examiner has explained that it could take them as much as 10 days to determine what he died from because they still have "to do additional testing which will include toxicology and tissue testing."
Police investigating his death had found pills at Ledger's apartment in New York and it is thought he might have died of an accidental overdose of the prescribed medication.
Tributes have been paid by family, fans worldwide and the film industry, and Heath Ledger’s father Kim Ledger said the death of his "dearly loved son" was "tragic" and "accidental".
The relationship between Heath Ledger and his actress girlfriend Michelle Williams, with whom he has a two-year-old daughter, Matilda, had ended in September., and a further tragedy is that the little girl will have to grow up without her father being alive.
