Approaching a comedy character is fun because you get to sit down with the director and ask, "What makes you laugh?" Then you end up bouncing ideas off each other.
Rupert Grint is exactly like his character Ron, in that they are both incredibly funny, friendly, and loyal.
I never contemplated. I just went in there and did my acting. I never thought, "What's the character actually feeling here? What's he trying to get across?" And never looked at it from that classically trained actor's point of view.
You have to prepare for the unexpected. You have to be able to react to things that don't necessarily happen every night, or aren't supposed to happen every night. And you have to react to it in character.
As a character he is really great because he has got the funny sides and the comedy, but he also is kind of useless sometimes.