Harry Potter's saga is ending, but his magic spell remains. Thousands of fans from around the world massed in London on Thursday for the premiere of the final film in the magical adventure series.

They thronged Trafalgar Square, where the stars walked a rain sodden red carpet, and nearby Leicester Square, where the movie was being shown in a plush movie theatre, braving the inevitable London rain with umbrellas, waterproofs and good cheer.

Sun broke out as cast members, including leads Daniel Radcliffe, Emma Watson and Rupert Grint, and Harry's creator J.K. Rowling began arriving on the red carpet, signing autographs and chatting with fans.

Speaking from a stage erected in Trafalgar Square, 21 year old Radcliffe, who has played the boy wizard since he was 11, told fans that Harry's story would never end.

he said that Each and every person, not just here in this square but around the world who have watched these films for the last 10 years, they will always carry the films with them for the rest of their lives.

Rowling wiped away tears as she thanked the actors for the amazing things they did for my favourite characters. The fans, who chanted thank you as Rowling and the cast took the stage, came from around the world. Many had camped out overnight, some for days. Most were young adults who grew up with the boy wizard and his adventures, and could not pass up the chance to say goodbye.

Luis Guilherme said that It's our childhood we made friends because of Harry Potter, a 22 year old graduate student from Sao Paolo, Brazil. I don't know how my life would be without it. I would be less imaginative, for sure, and less adventurous. I would never be here in London. 

We'd never forgive ourselves if we didn't come, one last time. The feeling is shared by the film's stars, who like many of their fans grew up with the series.

Daniel Jacob Radcliffe is an English actor, best known for playing Harry Potter in the feature film series based on the popular book series.  Daniel Radcliffe just turned 21, and he's already given up drinking.Those Harry Potter kids sure are grown up now, and star Daniel Radcliffe is grown up enough to know that he has a problem. Daniel Radcliffe said he has given up drinking alcohol after realizing he was partying too hard.

Daniel says he began to drink too much while filming "Harry Potter and the Half Blood Prince,the sixth movie in the Harry Potter series, in 2009. He said; "I became so reliant on alcohol to enjoy stuff. There were a few years there when I was just so enamored with the idea of living some sort of famous person's lifestyle that really isn't suited to me." He added that he decided to cut out drinking altogether, instead of simply cutting down. He also says he was lucky that the paparazzi didn't catch him partying up, not that there weren't plenty of opportunities. "I really got away with that because there were many instances when a shot like that could have been taken." Now, he says he knows how to control himself namely by avoiding alcohol.

Radcliffe was speaking to GQ magazine in an interview released Monday. Radcliffe shot to fame aged 11 after he was cast as Harry Potter for the movie adaptations of J.K. Rowling's popular books about a teenage wizard. Many child actors have struggled to cope with adulthood, but Radcliffe said he was determined to prove that child actors could go on to build long careers. "If I can make a career for myself after Potter, and it goes well, and is varied and with longevity, then that puts to bed the 'child actors argument,'" he said. The last movie in the series "Harry Potter And The Deathly Hallows: Part II" premieres on Thursday.