Jim Broadbent (who I know mostly from Moulin Rouge, though he's been in plenty of other films) recently stated in an interview that he's going to play Horace Slughorn in the sixth Harry Potter movie, Harry Potter and the Half-Blood Prince.
What did he say exactly?
Over on DarkHorizons, Broadbent stated:
He's called Horace Slughorn. He's a retired teacher of magic who's drawn back out of retirement because he's got some secrets they need in the battle against the Deatheaters and he's quite star struck as a teacher and he's drawn back into the fold because he likes to notch up celebrity students, and he's drawn back by Harry.
He will be wearing tweed.
Broadbent also mentioned that Slughorn is a "quite a comic character," and that he's already had some costume fittings, mostly for "tweedy sort of things with a bit of padding."
If you already have a 2008 calendar...
...mark November 21, 2008 — that's when Half-Blood Prince will hit theaters!