Updated 22 November 2002, 11.40

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"I don't really like it very much," he said on Channel 4's Ri:se. "I got a detention when I came back from the film premiere because I forgot my kit three times. I had to clear up the sports shed."

Nervous

"My teachers suck up a bit as well. I shouldn't have said that!"

Rupert, like all the other young Potter stars, has a private tutor on the set, but he has to go back to school in between filming.

He also said he gets a bit edgy when he first meets really famous actors, like Kenneth Branagh, who plays Gilderoy Lockhart in the Chamber of Secrets.

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"I get quite nervous when I meet them because they're really famous but once you get to know them, they're really down to earth and nice," he said.

Rupert was on Ri:se with his Thunderpants co-star, Bruce Cook.

Rupert admitted he actually thumped Bruce in a scene where he has to slap his face.

"One of the crew members paid me £5 to actually whack him in the film," Rupert laughed. "But it was really fun to film."

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