A major casting change has been made on the filming of Harry Potter and the Order of the Phoenix.
Helena Bonham Carter
Death Eater Bellatrix Lestrange was to be played by Helen McCrory.
But she's now had to be replaced as she's expecting a baby and would be heavily pregnant when her scenes in the Ministry of Magic were filmed.
Newsround can exclusively reveal that she will now be played by Helena Bonham Carter, who played Charlie's mother in Charlie and The Chocolate Factory.
A few pieces of other casting have now also been confirmed for the fifth movie.
The role of replacement Care of Magical Creatures teacher Professor Grubbly-Plank has gone to Apple Brook.
She's an experienced actress who has appeared in film, TV and stage productions for more than 25 years.
The casting of the young Marauders has also been completed.
Young Sirius will be played by James Walters, Young Lupin by James Utechin and Young Snape will be played by Alec Hopkins.
Actor Jason Piper has also been cast in the part of the Bane the Centaur.
Harry Potter and the Order of the Phoenix is due to be released in July 2007.