Harry Potter star Daniel Radcliffe said there has been "something really incestuous" about the idea of him dating co-star Emma Watson.
The 19-year-old actor said that while a relationship between him and Watson, 19, who plays Hermione Granger, would be "everything the fans ever wanted", it was just not happening.
But he said the teenage stars of the boy wizard films were all "unbelievably horny" between the filming of the third film, Harry Potter and the Prisoner of Azkaban, and the fifth, Harry Potter and the Order of the Phoenix.
He told Esquire magazine: "There was a period when we were the only boys and girls any of us knew.
"And so, you know, we were all unbelievably horny from about the third film to probably about the end of the fifth; then it all settled down.
"But, God, for a few years...".
He added: "There was never anybody I fancied that much in the cast, though the conspiracy theorists always like to say that me and Emma are dating.
"We know it'd be everything the fans ever wanted.
"I'm sorry guys, it's not happening. It's just not. There's something really incestuous about the idea of it."
Radcliffe also said he was bullied at school but used the skills he learned on the film sets to fight back.