There are also rumours that whoever does play Voldemort, will share the role with a computer-generated image of the villain.
Old Voldemort: Christian Coulson
The actor will only play Voldemort once the character has regained strength in the film. At the start of the fourth book, Voldemort has been reduced to a small, helpless creature, which will be created by a computer, it's been reported.
The Potter actors and staff are doubly busy at the moment. As well as preparing for the fourth film, they're building up to the big release of The Prisoner Of Azkaban on 4 June.
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