We were surprised by a few new additions to the film, injected by director David Yates and screenwriter Steve Kloves in order to visually illustrate events only referenced in the book. "In the sixth book Jo talks about the Death Eaters attacking, kidnapping and striking terror into communities and she plays that idea backstage in the book," explained Yates. "You read about it but you don't experience it. We wanted to bring that experience to the fore for the audience so they kind-of felt what it was like and they could actually see what the Death Eaters were doing."

This was illustrated in two scenes glimpsed in the recent trailer: the Death Eaters attacking London's Millennium Bridge and a Christmas attack on The Burrow -- home to the Weasley family. In the trailer we see Harry running through the reeds surrounding The Burrow, perhaps an attempt to escape -- or confront -- this movie's new bad-guy Fenrir Greyback, described in the book as "the most savage werewolf alive."


For Yates, though, it's the quieter, character-based moments that he finds the most exciting, with Harry's other nemesis - teenage hormones -- making an appearance. "Steve came up with this notion that, after Order of the Phoenix, Harry's in this quite intense, dark place and he's riding the trains to free his brain a wee bit and he meets this really attractive waitress who he really likes," he told us. "You immediately set up the notion that suddenly these characters are a bit more aware of the opposite sex. I thought it was a really charming, lovely idea."

Talking of hormones, we also met Ron's new love interest Lavender Brown, played by newcomer Jessie Cave. Cave told us that winning the audition was a real surprise. "I just screamed," she said. "The group in front of me thought I was ill. I really just didn't believe it."


But is she anything like the boisterous Lavender? "I'm actually quite shy and I'm not a loud character," she told us. "It's quite fun to play someone who is, because I guess everyone has a loud character inside of them waiting to jump out. I'm not saying that I want to jump out and be loud, but people can imagine that's what they'd be like!"

As Harry Potter enters his penultimate year and the threats on his life become ever more real, perhaps it's comforting to know that not everything has to be darker and more intense. Join us again in July to read our full experience on set, as well as the rest of our in-depth interviews with Daniel Radcliffe, Jessie Cave and David Yates, Emma Watson, Rupert Grint, Tom Felton and Bonnie Wright.