David Thewlis: Alfonso Cuarón, in the rehearsals, without J.K. Rowling’s knowledge, told me that [my character] was, in fact, gay. So I’d been playing a part like a gay man for quite a long time. Until it turned out that I indeed got married to Tonks. I changed my whole performance after that. Just saw it as a phase he went through.

Bonnie Wright: The epilogue in Deathly Hallows — Part 2, “in which we jump forward in time. It was such a bizarre feeling. It was a complete cycle of a generation, because the young girl who was playing [Ginny's daughter] Lily Potter was 10, and it was her first ever experience on a film set, and I was her age when I started in exactly the same set, on Platform 9 and 3/4.”

Helen McCrory: (on her favourite scene in Deathly Hallows: Part II) ”Mine’s a cheat — I can’t really talk all about it, because you haven’t actually seen it yet. But the culmination of Harry looking at Voldemort, and all of us being present in that scene that we did with all those extras — they were really there, the place was on fire — it was extraordinary. The silence and the concentration at 10 o’clock on a cold, frosty morning, with that grey-blue light that we only have in rainy, rainy London town, and realizing that for one of those people, he had been waiting literally all his life to say those lines and finally stand up and to prove, in his character, that this character is a man fighting for what is good, was an extraordinary thing to witness. We filmed it in real time. It really happened, and it was a privilege to be there. It was electric.”