Last Updated: Tuesday July 07 2009 12:46 GMT

See how the Potter stars have changed

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Harry Potter and the Half Blood Prince is the sixth film to be made from JK Rowling's best-selling books.

For the past eight years Daniel Radcliffe, Emma Watson and Rupert Grint have grown up on screen along with their characters Harry, Hermione and Ron.

Check out some of their premiere performances to see how much they've changed...