Daniel Radcliffe and Emma Watson used to argue constantly

For the last ten years Harry Potter stars Daniel Radcliffe, Emma Watson and Rupert Grint have all appeared to be the best of friends, however now that filming has stopped and theyve all moved on to other projects, the actors have started to reveal the truth behind their friendships.

Daniel has had to backtrack lately after saying that although he speaks to Emma all the time he hardly ever speaks to Rupert, he had to clarify the comment, reassuring people that the boys are really really really good mates still, after fans started to panic.

Now, speaking to the Radio Times, Daniel has admitted that his relationship with Emma has been an eventful one, which has contained lots of bickering. He said, Oh, God. We used to argue about everything. Religion. Politics. I remember one of the big arguments we had on the fourth film - we didn't speak to each other for a couple of days She was arguing about the Latin language, that nobody knows what it sounds like, what a Latin accent should be. And I was like, 'Yeah, but it's still spoken a lot in the Catholic church.'"

Such a w**ky argument, looking back, and it got totally out of hand. She was furious; I was livid. I certainly would advise anyone, if you're going to debate with her, know your s**t."

Daniel Radcliffes new film Woman In Black is released in cinemas this Friday.