Harry Potter heart-throb Tom Felton has been giving out acting advice to all the girls who'll be trying out for the part of Cho Chang at the weekend.
Tom, who plays Draco Malfoy, said it's good to make the casting people laugh, as it'll stick in their minds.
"If you can make them remember you, then it helps," he said. "Obviously being a good actor helps too!"
Thousands of girls are expected to turn out in the cold for the open auditions being held in London on Saturday.
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