The 34-year-old "Southpaw" star, who earned an Oscar nomination for his role as Ledger's lover in the romantic drama, said it is unfortunate that we won't be able to see more of the late "The Dark Knight" actor, reported E! Online.
"Listening to (the clip) brings me back to thinking about doing that scene with Heath and the honour it was to work with him and the beauty of his work. I miss him as a human being and miss working with.
"And what an unfortunate thing it is that we won't be able to see the beauty of his expression and hearing those things really gets you," he said.
"He was incredibly special and that doesn't even come close to encapsulating who he is who he was...
"I think losing Heath and being a part of a family that was like something like that movie we made together makes you see that, makes you appreciate that and hopefully moves you away from the things that really don't matter to the things that do," he said.