After reading this rumor on the HP newsgroup, I checked it out, and sure enough, IMDB has Miriam Margolyes listed for Professor Sprout in "Chamber of Secrets." Dang! I adore her, but I've pictured her all along as Madam Pomfrey! (If anyone reads my next Hogwarts fanfic, please do me the favor of picturing Madam P as Miriam Margolyes. ) Something I noted in the "Sorceror's Stone" movie was that, when they panned around the staff dining table, I didn't see anyone who looked remotely like Professor Sprout. I would have gone with someone blonde (Prunella Scales, aka Sibyl Fawlty, is one who comes to mind, although there are plenty of British actresses who can play mature, slightly dowdy characters). Maybe Sprout and Pomfrey are actually twin sisters and we just don't know it yet...