The deaths of Brad Renfro and Heath Ledger within a week of each other, both involving drugs (legal or illegal), was disturbing. Two great talents; two of my favorite actors. Brad's portrayal of a teen pushed to murder of a sociopath in Bully (based on a true story) was incredible. Heath of course became a far bigger star, so his story is eclipsing Renfro's. I think Ned Kelly is my favorite movie of Ledger's; it's hard to pick one. He could do so much with just vocal inflections... a really amazing talent that few actors have.
Here's a cartoon that appeared in the Daily Wildcat.