Daniel Radcliffe And Emma Watson 'Used To Argue About Everything'

Daniel Radcliffe has warned anyone that is thinking about arguing with his 'Harry Potter' pal Emma Watson to think again, because she does not back down.

'The Woman In Black' actor has confessed that he used to bicker all the time while he filmed 'Harry Potter' with the actress but it wasn't about who used the last of the loo roll or had the last biscuit on set, oh no - they argued about all sorts.

In an interview with the Radio Times, Daniel admitted that one clash meant that they gave each other the silent treatment.

"Oh, God. We used to argue about everything," he recalled. "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 - was about... 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.'"

He added: "Such a w**ky argument, looking back, and it got totally out of hand. She was furious; I was livid."

But talking about anyone who's thinking about taking the Oxford University student on, he said: "I certainly would advise anyone, if you're going to debate with her, know your s**t."

And where was Rupert Grint in all of this?

Take a look at the 'Harry Potter' stars through the years...

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