Harry Potter' Finale

Emma Watson was stunned to hear about her Harry Potter co-star Daniel Radcliffe's secret booze battle because he was the "most professional" actor on the set of the film franchise.

Radcliffe, who shot to stardom as the boy wizard at the age of 11, went public with his alcohol issues in the new issue of men's magazine GQ, revealing he was so worried about becoming an alcoholic he is now a tee-totaller and never drinks.

Even though the actors finished filming the movie more than a year ago, they said there were still scenes in "Deathly Hallows, Part 2" that made them fight back tears. Rupert Grint said that, despite the fact he's seen the movie twice, he had to walk out of the theater during the London premiere last week.

"I caught a bit. It is really sad," he told MTV News."There's a scene where all three of us are on the bridge after the battle, the castle is on fire ... there's a weird parallel between that and our lives. That always gets me."

For Tom Felton, it was the epilogue scene that concludes the movie that almost brought him to tears. That scene has especial emotional resonance for him because his real-life girlfriend, Jade Olivia, plays the wife of his character Draco in the flash-forward sequence. But it was actually Daniel Radcliffe's scene between Harry and his children at King's Cross station that affected him the most.

"There was something really nice about seeing Daniel with his kids at the end. I really thought Daniel did a marvelous job of being older. I got a bit emotional about that," Felton said. "Even though it's funny, it was really quite sad to think that, 'Christ, our lives have flashed before our eyes. We're old!' "

Radcliffe also told MTV News that he found scenes in the film "heartbreaking," especially Alan Rickman's performance during Severus Snape's flashback sequence.

Beyond the film, Felton said he nearly cried during Radcliffe, Grint and Emma Watson's heartfelt goodbye speeches at the London premiere last week. He had to talk himself through it, saying, "Just keep it together, Tom, just keep it together," but according to the "Rise of the Planet of the Apes" actor, it was a close call.