Heath Ledger's Father Says Sister Warned Actor About Mixing Drugs

Kim Ledger shares details of the night before his death.

Kim told Australia's News.com.au that Heath's sister spoke to the "Dark Knight" actor the night before he died and told him, "You can’t mix drugs that you don’t know anything about."

His father said Ledger's reaction to his sister's concerns was, "I’ll be fine."

"It just put his whole system to sleep I guess,” Kim told the local site.

Kim is now an advocate for drug awareness and thinks his talented son was not an addict in any way.

He continued, "Heath mixed a couple of drugs together with sleeping tablets and he’s gone forever."

Shortly after his death, Ledger received a posthumous Oscar for his role as The Joker in "The Dark Knight." That film is widely considered one of the best in the genre's history.

"Losing a child is something that never leaves you. You can live with the pain, but it never leaves you," Kim said, adding his work and mission is now to save other lives.