"Mr. Heath Ledger died as the result of acute intoxication by the combined effects of oxycodone, hydrocodone, diazepam, temazepam, alprazolam and doxylamine," medical examiner’s spokeswoman Ellen Borakove said in a statement.

The drugs are the generic names for the OxyContin painkiller, the anti-anxiety drug Valium, Xanax, an anti-anxiety drug, and the sleep aids Restoril and Unisom. Hydrocodone is another name for ibuprofen.

Ledger, who was nominated for an Oscar for his role in "Brokeback Mountain," died in his New York City apartment Jan. 22.

He was 28.

Ledger’s parents and other close relatives have been gathering in their hometown of Perth, Australia, this week after spending nearly two weeks in the U.S. immediately following his death.

They are reportedly planning a private service in Perth and will either bury Ledger’s body or inter his cremated remains in the city.