The Associated Press reports that Heath Ledger, the 28-year-old Australian actor, was found dead today in the Soho apartment of Mary Kate Olsen, who was away in Los Angeles. The cause of death is unknown but it may be related to drug use.

Ledger was nominated for an Oscar for his role in “Brokeback Mountain” and lived in Boerum Hill with Michelle Williams and their daugher Matilda until their break-up a year ago. Their movement around the Brooklyn neighborhood was followed by the local media with great interest. He recently appeared in the Bob Dylan bio-pic, “I Not There.”