Harry Potter star Emma Watson is so sick of the media speculation surrounding her friendship with co-star Daniel Radcliffe, she has vowed never to start a romance with the actor.

Watson, who plays Potter’s sidekick Hermione Granger in the hit film franchise, is convinced fans of the boy wizard series desperately want her and Radcliffe to become a couple in real life - because their characters fail to unite in author J.K. Rowling’s books.

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."