Casting
Fewer than three weeks after a huge open casting session for the part of Luna Lovegood, 14-year-old Evanna Lynch has been chosen for the role.
Evanna, who's from Ireland, was chosen from more than 15,000 other girls after queuing for hours at an open casting.
She'll start filming her scenes at Leavesden Studios just outside London later this month.
Other casting announced by Warner Bros. includes Natalia Tena, who's been in BBC drama Casualty, as Tonks.
Imelda Staunton will play new Defence Against the Dark Arts teacher Professor Umbridge.
Staunton recently appeared in the children's film Nanny McPhee.
The part of Bellatrix Lestrange, an evil follower of Lord Voldemort, has gone to Helen McCrory. Actress Kathryn Hunter will also appear in the film.
**This from CBBC Newround