And the 18-year-old blames the public's desire for the union for the constant press speculation about their relationship.
She says: "Dan Radcliffe is very charming, and very, very sweet and knows how to handle it (the rumours about their relationship). We've been handling this situation for six years now.
"Everyone has been going, 'Are you and Dan together?' Because it doesn't happen in the books, everyone is so desperate for it to happen in real life that any opportunity to come up with a story about it is taken."