Most of you should know that Heath Ledger was a great actor who starred in many movies such as "10 Things I Hate About You" and most notably "The Dark Knight" as The Joker. It was a great lost to the filming industry when he died at only the age of 28 who had a great career ahead of him, one of if not the greatest Australian actor to have lived.
Sam Worthington (as you should know) is also a great Australian actor who has only recently become big in the filming industry in films like "Terminator Salvation", "Clash of the Titans" (the remake) and of course "Avatar" as Jake Sully. Sam is growing to the top and looks to have a promising career ahead of him.
I'm not trying to state who is the better actor or that Heath Ledger can be replaced, I believe both actors to be some of the best to appear in movies in recent years. I would like to know what you think about it or can you think of other examples that I may have missed?