An article from CNET confirms

An article from CNET confirms some casting for Harry Potter and the Chamber of Secrets and adds a name which I don’t believe we’ve seen before: Gemma Jones (“Bridget Jones’ Diary,” “Wilde,” “Sense and Sensibility”) as Madam Pomfrey.

The new Harry Potter movie has hit problems – because the star, Daniel Radcliffe, is growing up too fast. His character is supposed to be 11 years old [sic] at the start of new movie, Harry Potter and The Chamber of Secrets. But Daniel, who will turn 13 in July, is fast becoming an adolescent.

The boom in the bush has sparked an enrolment frenzy in boarding schools across Adelaide, with some having to turn students away. Colleges are enrolling record numbers into their boarding houses and have introduced waiting lists. Principals say strong economic times on the land and the improved image of boarding homes are leading the recovery. It follows the successful Harry Potter books and film, in which the young hero attends a boarding school for wizards.