Updated 29 October 2001, 17.30

The chess scene from the film

"I saw it on the Newsround website and then I did my own video, pretending to be a drama teacher and rapping and making the script up."

The Great Hall

But even the excitement of getting the part didn't compare with the start of filming.

"When I walked into the Great Hall for the first time, it was absolutely incredible.

"There were all these effects, with all the candles floating, food on the table, all the flamboes were lit - it was one of the most amazing things I've ever seen in my life."

Chess scene

Harry and his friends in the Great Hall

And you won't be so surprised to hear that Rupert's favourite part of the film is where Ron gets to hog the limelight for a while.

"The chess scene was pretty difficult - there was loads of dust everywhere. But all the way through the film, Harry's been doing all the brave stuff. So Ron was really happy, because that's his fave thing - chess."

The movie has its world premiere on Sunday and opens across the UK on 16 November.

And we've got more exclusive interviews with the child stars coming up: Hermione on Tuesday and Harry on Wednesday. Don't miss 'em!

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