The film will be shown at new theme park The Wizarding World Of Harry Potter in Orlando, Florida.
All the stars of the movies including Daniel Radcliffe, 18, Emma Watson, 18, and Rupert Grint, 19 will shoot scenes for the special film before they start making the final Potter installment The Deathly Hallows.
They are working on extra sequences and clips which will be part of the rides, a source tells the Sunday Mirror.
JK Rowling has been involved in everything. She wrote the story.'
The theme park an extension of Universal Studios is due to open in 2010.
It will contain the village of Hogsmeade, the Forbidden Forest and Hogwarts Castle.