The world premiere of the final Harry Potter film is tonight and fans are already camping out in Trafalgar Square in central London, braving rain for a chance to catch a glimpse of Daniel Radcliffe and Emma Watson.

Harry Potter fans have been staking their spots ahead of the first screening of Harry Potter And The Deathly Hallows Part Two since Monday, coming from all over the world for the final showdown.

harry Potter fans camp in Trafalgar Sqaure ahead of tonight's premiere.
Harry Potter fans camp in Trafalgar Sqaure ahead of tonight's premiere.

The main Harry Potter cast members Daniel Radcliffe, Rupert Grint and Emma Watson are expected to grace the red carpet tonight along with Helena Bonham Carter, Robbie Coltrane, Tom Felton and Alan Rickman.

At a press conference last night Watson, who Hermione Granger, said the role had changed her life.

"Hermione's been like my sister. She feels so real to me," Watson said. "I will miss being her. That is devastating. She has pushed me and made me a better person."

Emma Watson poses for a photocall ahead of the final Harry Potter premiere.
Emma Watson poses for a photocall ahead of the final Harry Potter premiere.

Watson also claimed that her on-screen kisses with Daniel Radcliffe and Rupert Grint were "equally awkward."

"Kissing Harry in that scene was a figment of Ron's imagination of the worst possible thing he could ever imagine so the kiss had to be passionate. I was half-naked and covered in paint so that was pretty awkward,” Watson said.

However, the actress said things were just as tricky with Ron Weasley.

"It's obviously hard to put our personal history to one side, considering that we did grow up together. I don't think they mind me saying that you know if you have done it sort of four or five times kissing gets quite boring. Genuinely," she said.

Harry Potter stars take a bow
Harry Potter stars take a bow.

The Harry Potter stars were mobbed by fans when they left the press conference and went on to pose for a photocall outside the St Pancras Hotel.

Up to 8,000 Harry Potter fans are to be given special wristbands which will get them a seat at the premiere. By last night more than 3,000 were queuing to secure their spot.

If you're hading to Trafalgar Square to catch some Harry Potter And The Deathly Hallows Part Two action, best set off now!