Typecasting is an interesting thing because, in a way, if you're good at something, you're going to work at that thing. In other ways, you constantly have to change people's opinion of you as one thing, especially if you want to play different roles. You have to shatter that image sometimes.
It used to be that you kind of got pigeonholed into one thing - you're either a stage actor or a TV actor or a movie actor. Today, there's a lot of crossover with film actors doing television, which never happened before, so those lines are a little bit more blurred than they used to be.