Heath Ledger documentary trailer released

Heath Ledger's life is promised to be celebrated and explored in a new documentary, for which the first trailer was released on Wednesday.

I Am Heath Ledger features a lot of home videos he recorded himself, along with interviews with those who knew him - including his family, Naomi Watts, Ben Mendelsohn and Ang Lee.

Ledger died from a drug overdose in January, 2008, in New York.

The Dark Knight star has already been featured in Netflix docuseries Too Young to Die, in which his father, Kim Ledger, revealed pages of his Joker diary.

His other films included Brokeback Mountain, A Knight's Tale, 10 Things I Hate About You, Two Hands, The Patriot, Candy, The Brothers Grimm and Ned Kelly.

I Am Heath Ledger will premiere at the Tribeca Film Festival in New York later this month.