There have also been rumours that the part of journalist Rita Skeeter in the fourth film will be played by comedienne Jo Brand or TV presenter Anne Robinson.
Robinson's best known for her harsh presenting on the Weakest Link.
But a director for Goblet of Fire is not even confirmed yet because Chris Columbus has ruled out making a return until at least Potter Five.
So insiders say even initial thoughts on casting the fourth film are still way off in the future.
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