Alan Rickman to film HBP role in February

In a small interview with Entertainment Weekly, the actor who plays Snape in the Potter films reveals he'll begin filming his parts for Half-Blood Prince in early February:

EW: Okay, I think your wranglers are giving me the signal, but I have to say, even before I got to the end of the Harry Potter books —
Rickman: Before you go any further, I never, ever talk about that character. Number one, because it's not fair on kids who haven't read to the end. And for me to say anything — there's a bit of it that just should be left innocent. It's real storytelling, what she's done, and I'm part of that. So I just never talk about it.

EW: When do you go back to shoot Harry Potter and the Half-Blood Prince?
Rickman: They're shooting six [now], and I start shooting my part of it beginning of February.

EW: It's a bigger part for you this time.
Rickman: Ahh…. There's important stuff. [Smiles]