The Oscar-nominated actor Heath Ledger, 28, was found dead on Tuesday in his New York City apartment. The police said drugs may have been a factor, since pills that appear to be over-the-counter sleeping medication were found near his body.

Ledger started acting in Australia, where he was born, but his career really took off around the time he was nominated for an Oscar for "Brokeback Mountain" in 2005. On the set he met fellow actor Michelle Williams, with whom he had a daughter, Matilda. The couple split up last year.

Heath Ledger was scheduled to appear as the Joker this year in "The Dark Night," a sequel to 2005's "Batman Begins."

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