Watch: Heath Ledger's sister 'screamed and cried' watching new documentary

With the recent release of I Am: Heath Ledger, there's been plenty of emotional reflection over the late actor's life and work.

But it was hardest for Ledger's family. His sister, Kate, spoke to The Project on Wednesday night about the "incredibly emotional" experience of watching the documentary for the first time -- made more difficult by the fact that it was the family's first time seeing much of the collected footage.

"I think I screamed and cried through the whole first viewing," she told the TV program. "It's quite a cathartic experience for our family."

Kate said she still finds it difficult to watch her brother's films, nine years on from his tragic death, but it's getting better.

"I now have 13-year-old girls who are now wanting to see the films. So through them, I'm finding that it's become a little easier for me to see the joy that it gives them," she said.

While it's well-noted Heath was an avid chess player, few knew that he was very close to achieving elite status in the game.

"No one could beat him from the age of 10 ... he was only a few points away from being like, a Grandmaster. It was a true passion of his," Kate said.

What a guy.