J.K. Rowling: So, Gilderoy Lockart was the only child in his family who showed any magical abilities, so he was very proud of himself in going off to Hogwarts. And he was Sorted into Ravenclaw House, though I suspect - I think people will be unsurprised to hear that I think - he narrowly escaped Slytherin. But he scraped into Ravenclaw.

Gilderoy is quite a modern kind of celebrity in the way that he likes to think of new ways to make himself famous. So he decided he’d quite like to put a range of hair-care products out onto the market; he's very proud of his naturally wavy hair. So, I like to imagine that he discovered the luster giving properties of occamy eggs, and occamy eggs come from quite a vicious creature - the eggs have silver shells. So, these shampoos were found to be too dangerous and too expensive to produce, so Gilderoy never achieved that ambition.

Gilderoy Lockhart isn't his pseudonym. Gilderoy Lockhart is his name. I think that that says something about his mother, who was very ambitious for her son, and encouraged him in the belief that he was a remarkable person. Gilderoy's quite a flashy name, I think.