In the video, David Yates, the director of the last four "Harry Potter" films, explains that the two actors had different approaches to filming the kiss. He said that since Emma Watson didn't want to have to do multiple takes of the scene, she was "going to get it right the first time." He tells how he could see her psyche herself up before the camera rolled, but Rupert Grint hadn't worked up to the same level of intensity. "I think Rupert wasn't quite expecting it," Yates said, "and then she just went for it." But then the kiss was quickly broken as the two friends burst out laughing.
While it might seem like kissing isn't a bad way to spend a work day, Grint and Watson explained to the UK's TelegraphTV why the scene was so difficult for them. "It feels weird saying this, because I'm sure loads of guys are just really jealous," Grint said. "I mean, she's lovely. I just felt so wrong, really. Kissing this person I've known since she was nine."
Watson said she also felt quite a bit of pressure to please the fans who had been waiting so long for the kiss to happen. She said, "Can you imagine, building up to a kiss for, like, ten years? We've been building up for this kiss for a decade. How am I going to do this justice? I felt like it's the most anticipated kiss of all time. So, it was intense."
There will be many more behind-the-scenes secrets revealed in the bonus features of the upcoming Blu-ray.