Heath Ledger died due to depression after playing Joker in The

Heath Ledger wasn't depressed' over 'The Dark Knight' role

Why Did Heath Ledger Kill Himself? Are Clues Hidden Somewhere?

Inside Heath Ledger's tragic final days before being found dead at home aged 28 - Irish Mirror Online

Did Heath Ledger Predict His Own Death After Playing The Joker?

The Dark Knight's' Joker did not kill Heath Ledger, says sister

Heath Ledger's tragic autopsy and 'one-off thing' that caused his death 13 years ago - Irish Mirror Online

Heath Ledger's family shuts down rumours his role as The Joker made him depressed - National

Revealed: Heath Ledger's diary which he kept while preparing for Joker

How Playing The Joker Changed Heath Ledger For Good

Heath Ledger and Ben Affleck's Addiction as Batman