Heath's History Of Substance Abuse

The Daily Mail report that an 'insider' disclosed to the paper that Heath had been battling substance abuse problems for some time. According to their source, the breakup of his marriage to Michelle Williams was devastating for him:

Heath was shattered by his split from Michelle. He became a recluse. He barely slept; he was dealing with terrible mood swings," the report says.

"Heath totally wanted to be on his own these past few months since he and Michelle split in September," says a source. "She was very much in love with him, but the fact he continued to dabble in drugs kept their relationship from being one she could rely on."

"He adored his daughter Matilda, and when Michelle called it quits, he missed Matilda so much that he was thrown into a deep dark depression."

"As for Ledger's trip to rehab, the source said: "It was during his filming of The Dark Knight. Heath's addiction was really getting in the way of his ability to act. He went to rehab but left fairly quickly, within a number of days," the Daily Mail's source said.

An autopsy is scheduled for tomorrow and the cause of death will be revealed, though the consensus now seems to be that Heath's death will be deemed a drug overdose.