“Dress robes will be worn,” Professor McGonagall continued, “and the ball will start at eight o’clock on Christmas Day, finishing at midnight in the Great Hall. Now then—”

Professor McGonagall stared deliberately around the class.

“The Yule Ball is of course a chance for us all to—er—let our hair down,” she said, in a disapproving voice.

Lavender giggled harder than ever, with her hand pressed hard against her mouth to stifle the sound. Harry could see what was funny this time: Professor McGonagall, with her hair in a tight bun, looked as though she had never let her hair down in any sense.

“But that does NOT mean,” Professor McGonagall went on, “that we will be relaxing the standards of behavior we expect from Hogwarts students. I will be most seriously displeased if a Gryffindor student embarrasses the school in any way.”

The bell rang, and there was the usual scuffle of activity as everyone packed their bags and swung them onto their shoulders.

Professor McGonagall called above the noise, “Potter—a word, if you please.”

Assuming this had something to do with his headless rubber haddock, Harry proceeded gloomily to the teacher’s desk. Professor McGonagall waited until the rest of the class had gone, and then said, “Potter, the champions and their partners—”

“What partners?” said Harry.

Professor McGonagall looked suspiciously at him, as though she thought he was trying to be funny.

“Your partners for the Yule Ball, Potter,” she said coldly. “Your dance partners.”

Harry’s insides seemed to curl up and shrivel.

“Dance partners?” He felt himself going red. “I don’t dance,” he said quickly.

“Oh yes, you do,” said Professor McGonagall irritably. “That’s what I’m telling you. Traditionally, the champions and their partners open the ball.”

Harry had a sudden mental image of himself in a top hat and tails, accompanied by a girl in the sort of frilly dress Aunt Petunia always wore to Uncle Vernon’s work parties.

“I’m not dancing,” he said.

“It is traditional,” said Professor McGonagall firmly. “You are a Hogwarts champion, and you will do what is expected of you as a representative of the school. So make sure you get yourself a partner, Potter.”

“But—I don’t—”

“You heard me, Potter,” said Professor McGonagall in a very final sort of way.

A week ago, Harry would have said finding a partner for a dance would be a cinch compared to taking on a Hungarian Horntail. But now that he had done the latter, and was facing the prospect of asking a girl to the ball, he thought he’d rather have another round with the dragon.