Potter producers are looking for two Asian girls aged between 13 and 16 to play the parts. They say the girls don't have to have acted before, but they must look right for the part and get on well together.
Rupert Grint, who plays Ron, and Emma Watson, who plays Hermione, were both picked from thousands of kids, and neither of them had acted professionally before.
Potter staff have held auditions for the Patil sisters before, in Birmingham and Bradford, but they haven't found what they're looking for yet.
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