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Photographs from the third Harry Potter film have been released by film studio Warner - showing how the stars are growing up.

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Michael Gambon is seen as Dumbledore for the first time - he takes the place of Richard Harris, who died in February.

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Gary Oldman (right) plays Sirius Black, who escapes from Azkaban prison and is suspected of wanting to kill Harry.

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Daniel Radcliffe, who plays Harry, and Rupert Grint, who plays Ron, are now both 14. Emma Watson, who plays Hermione, is 13.