The CBBC has a new interview with Tom Felton (Draco), Matthew Lewis (Neville), James Phelps (Fred) and Oliver Phelps (George) from right after they saw Harry Potter and the Half-Blood Prince for the first time:
Matthew Lewis, who plays Neville Longbottom in the film series, said fans will see his character getting more strong-willed and starting to change in the Half-Blood Prince.
And it's probably no surprise to fans of the Harry Potter books that Matthew thinks the story of the Half-Blood Prince isn't that nice, in terms of what happens in it.
“Every year, we always say 'it's much darker, this one', but this one really is. It gets pretty heavy in parts,” he said.
“But the balance they've achieved with the comedy… the timing is wonderful.
“Jim Broadbent [Professor Slughorn] is superb, Rupert Grint [Ron Weasley] is on top form and it is very very funny.”