He's the Narrator of course.
I"m saying this without having read the script, but would it really matter if the actors are a bit older than what the script entails?
Well, I think it would, although I think some would disagree. I've explained why I think it would earlier in this thread, but here are my main points:
- Django is a freed slave with a history of running away. If he were a man in his forties I'd have to wonder if he would still try to escape. Wouldn't he have excepted his lot in life by then?
- Django trains under the guidance of the older Dr. Schultz. Typically the teacher is older than the student. By making him older I don't think the dynamic works as well. At one point Schultz calls Django "son", which I think would be given a more negative context if Django were older.
- If Django was older (and is described as being skinny in the script), how much use would he make as a slave? Wouldn't he have moved indoors as a house slave, living in relative comfort?
- It's implied that Django's wife is in her twenties. I suppose Django could have a much younger wife, but I'd say it's more likely that they are close in age. If you were to make him older, you'd probably maker her older too. And a black woman in her forties is probably not the kind of woman who would be coveted by older, white men.
As for the role of Calvin Candie, a few people online have argued that it wouldn't change the role if he was played by a younger actor. But consider some of the actors who were brought up before these DiCaprio rumours surfaced. Guys like Harvey Keitel, Powers Boothe, and Jeff Bridges. Clearly the character has a certain image that DiCaprio just doesn't have. I know he's an actor, and should have the talent to play a villain like Candie, but some actors are just better suited for certain roles than others. I find the idea of DiCaprio on screen, with a grownup moustache and white suit, speaking with a southern drawl to be really unappealing.
One final note, there actually is a Narrator in the script (and a rather unnecessary one at that).