Krum has been cast too - here's the info from CBBC:
Potter casting directors have found the lad who will play Bulgarian Quidditch star Viktor Krum in Goblet Of Fire, according to reports.
A Bulgarian news agency says the lucky boy is indeed a Bulgarian, but he lives in London with his parents.
It said he was not among the hundreds of boys who queued up in the Bulgarian capital Sofia to audition for the part.
The report claims two boys from this audition were on the shortlist, but the London-based lad landed the role.
Forty six audition tapes from the Sofia casting were sent to film-makers in London, the report said.
"It was a tough choice because they were impressed by many of the Bulgarian candidates," said the man who organised the Sofia auditions.
The identity of the lucky lad has not been revealed.
Krum has an important role in GOF.
As well as being the star pupil at his school, he is Hermione Granger's love interest.
Shooting for the film, directed by Mike Newell, is set to start between April and June, and should be released at the end of 2005.