Alison Jones finds the Harry Potter stars are still having a wizard time...
It seems like only the blink of an eye that three cute little pre-teens faced a waiting world and revealed they were to become the most famous students of magic since Merlin was a lad.
Back then Daniel Radcliffe was so innocent he admitted that he cried when he heard he'd got the role of Harry Potter.
Back then he was obsessed with World Wrestling Federation. These days he's reading Zola and out all night at rock festivals.
And he's not the only one who has changed. Rupert Grint, aka Ron Weasley, has swapped a broomstick for a gear stick and is taking driving lessons.
And Emma Watson - Hermione Granger - is maturing so quickly she is fully capable of winding producer David Heyman round her little finger at the press conference for the latest instalment of the wizardly saga.
The young actors' emotional growth, as well as the physical, is reflected in that of their characters.
Not only are they facing deadlier enemies but they also have to contend with rioting hormones, the mortification of first crushes and the paralysing fear that that affection might not be returned.
"In a way growing up with Harry makes it easier to act in each of the films because I've been through all the stuff that he is going through fairly recently," says Daniel, a worldly 16 to Harry's comparatively callow 14.
He admits to having had a girlfriend though says he is single now. Harry too is dipping a tentative toe into romantic waters, drooling into his pumpkin juice over Cho Chang (played by newcomer Katie Leung).
Hermione predictably is already streets ahead of her two best friends, winning herself the Quidditch-playing version of Wayne Rooney, brooding sports star Victor Krum (Stanislav Ianevski).
It shows a whole new side to the bookish, bushy haired Hermione and one that Emma seems far more comfortable with.
"I don't really have to act anymore, I'm so close to her and know her so well. There's so much of me in her and her in me that it feels like I'm barely doing anything sometimes. I'm very fond of Hermione. She's turned into someone a lot of people can identify with."
Of the three, Daniel has emerged as the leader, accustomed to the limelight that comes with being the star of the show.
Dressed like an aspirant bank manager in shirt and tie, he is both gauche and precocious, a little too eager to entertain the assembled, with answers he is keen to make both smart and funny.
Rupert, a more typical teen in baggy tee shirt and shaggy hair, doesn't look bovvered, apparently content with this natural order of things.
The oldest of the group he has already started to break away from Ron, squeezing in another film - Driving Lessons, co-starring Julie Walters and Laura Linney - after Goblet had wrapped.
A master of understatement, he admits he's looking forward to the fifth film as "it's Ron's turn to sort of try Quidditch out."
That is supposing the Quidditch makes the final cut, as the novels get progressively thicker and the story darker.
Director Mike Newell, the man who made Four Weddings and A Funeral, struggled with the size of Goblet, knowing that if he had kept everything in the novel he would have had to make two films.
"The book's as big as a house brick. I felt the way of shedding the things that needed to be shed was to make it a thriller."
So out go the comedy relief of the Dursleys and Hermione's campaign to liberate house elves and in come firebreathing dragons, sexual innuendo, death and, finally, Lord Voldemort made flesh in the malevolently evil form of Ralph Fiennes.
"I'm in it and I was scared," reveals Emma. "At the same time I think we will have gained from it. It's always been about staying faithful to the book and you can't avoid the fact that someone dies in it. There are some serious and deep topics in it and I love the fact they haven't pulled the punches."
The genuinely thrilling action sequences require some dangerous looking stunt work (Daniel had to have scuba diving training for a scene in which he swims among the Merpeople in the lake at Hogwarts).
However, by far the most terrifying scene - for the boys at least - was having to learn how to dance.
"I really wanted to be good at it because my parents were amazing competition-winning dancers," explains Daniel,
But lack of rehearsal time meant that, in Daniel's case, the results were not strictly ballroom.
"You'll notice Mike very kindly didn't show anything below my waist. You never saw my feet move, which is quite a good thing."
Fortunately for potential girlfriends, dinner dancing comes fairly low on the list of ideal first date scenarios.
"I think I'm a slightly typical guy in that I don't know where I'd take a date. What do girls like? Paintballing?"
"Cinema? Coffee? Food?" Emma interjects, clearly despairing of the ignorance of teenage boys.
Whatever relationships the trio have been involved in they have been fairly low key as the media have largely left them alone, except for when they are publicising the films, allowing them to lead relatively normal lives.
"People find it quite hard to believe that we can, but we are actually able to go out and do things," says Daniel.
"For me, I only feel famous about two days a year which is the premieres.
"Having said that, it's a possibility that that may change when we're 18 because maybe the paparazzi and the photographers have been going slightly easy on us at this point so that might change, but I hope it continues."
* Harry Potter Goblet of Fire is now in general release