Grint: 'Kissing Watson like kissing sister'

Rupert Grint has compared kissing his Harry Potter co-star Emma Watson to "kissing my sister".

The actor, who plays Ron Weasley in the magical franchise, told the Daily Mail that their highly-anticipated screen kiss had taken five takes because they were both so nervous.

"The hardest things for me are intimate scenes... Kissing her was always going to be strange," he explained.

"We’ve known each other for ten years so it was a bit like kissing my sister. We were both determined to get it right the first time, but our first try was a disaster because we both felt so self-conscious we couldn’t stop laughing."

The 20-year-old, who recently completed filming on Cherrybomb, added that his Potter kiss would have been "even more challenging" if he had not had practise on the upcoming thriller.

"In that, I have my first bedroom scene - it was very nerve-racking and not remotely sexy because the set-up is so mechanical. It’s a very adult role, just the kind of thing I want to do more of."

Harry Potter And The Half-Blood Prince is released in cinemas next month.