Two made-for-television movies and a big-screen third instalment have won the High School Musical franchise millions of screaming fans under the age of 14. And while for those in an older age category it might not be at the top of their bucket lists, the stage version might lead some to reconsider. It's a musical based on a movie about a musical, which immediately puts those schmaltzy teen pop songs where they belong - on the stage, under the spotlights and accompanied by flips, high kicks and headspins. Where tracks such as What I've Been Looking For or Get'cha Head in the Game may come off as over-produced chintz on screen, polished choreography and stage costuming add a showtime sheen. The story itself is a well worn one: basketball team captain Troy and A-grade student Gabriella audition for the lead roles in their high school musical, fall in love and in the process unite the school's jock and nerd cliques. There is some struggle along the way of course, but if you were afraid Gabriella's arch-rival Sharpay would get the lead and hook the man, then you've obviously never seen West Side Story or Grease - both of which have more than a faint echo in High School Musical. 'There is a degree of formula involved in a show like High School Musical,' says director Paul Warwick Griffin. 'But it doesn't overdo the clich?. It's a very honest portrayal, and that's its greatest strength. Most people can identify with these characters. There's also a degree of new language that the show has found choreographically and musically. It's very rare that you get a show a younger audience can completely relate to.' For one, the pop-rock score is stuff kids might well hear on MTV. And where West Side Story follows the romance of two teen gang members, and Grease ends with Sandy and Danny changing who they are to be together (if an outfit change can be construed as such), the moral of High School Musical is just to be yourself and follow your dreams. Oh, and the two leads get to kiss once at the end, after a couple of hours of innocent musical romping. It's parent-approved entertainment that has struck gold with the 'tween' market - kids between the ages of seven and 14 that make up the main demographic of the Disney Channel, where the television movies air. The original flick premiered to an incredible 7.7 million viewers in the United States, while its sequel clocked up 17.2 million (High School Musical 3 was released in cinemas). The latest Disney statistics peg the first movie at an estimated 255 million global viewers. And the phenomenon is unstoppable, with a sprawling brand that includes a book series, video games, a reality show, and in Hong Kong, a High School Musical: Live! parade at Disneyland. Even China wants in, with a spin-off flick, High School Musical: China, currently in production. Meanwhile, the first live Disney stage show was performed in 2007, and since then has been put on by theatre troupes all over the world. Griffin's High School Musical Live On Stage lands at Hong Kong's Lyric Theatre next week, an adaptation of the first television movie with most of the same songs, plus two new ones written for the stage. 'It wasn't difficult to transfer [from movie to musical]. Contextually it's set in the theatre; it's about two young kids who audition for the school show. They challenge and alter the status quo, and bring about incredible joy in being on stage. It's a very theatrical movie to start with,' Griffin says. The stage show treads the same plotline as the film, but here's where the musical differs from the movie - the singers are actually, well, singers. Teen heartthrob Zac Efron plays Troy in the films, and he's admitted to lip-synching to someone with a more capable set of vocal chords. His doppelganger in the musical, Max Milner, is a 19-year-old performer ingenue from London whose voice Griffin describes as a cross between pop and rock, and 'fascinating' to listen to. Griffin heads up a cast of 30 or so, many of whom have been doing the show with Griffin for almost two and a half years. Others join the show for particular runs - Milner, for example, will debut as Troy in Hong Kong on the show's Asian tour. 'They're great fun, incredibly talented, and reasonably badly behaved in the nicest possible way,' says Griffin. 'Max's secret talent seems to be getting by on very, very little sleep. He seems able to go out partying till all hours of the night, and still come in and do his job.' Staples are musical director Charl-Johan Lingenfelder and choreographer David Gouldie, who brings the story to life with an intricate set of dance numbers heavily influenced by street dancing and hip hop. 'It's very, very heavy dance - one of the heaviest I've ever worked on, and I spent four years on Cats for example,' says Griffin. Breakdancing is the core of many numbers, with backflips and acrobatics making this one of the most physically strenuous and visually impressive dance shows on stage in years. 'There are a couple of songs that are really killers. The big basketball number, Get'cha Head in the Game - that's a really tough number for the boys, because they've to sing, dance and get used to co-ordinating with the basketballs,' Griffin says. 'A really complicated one is Stick to the Status Quo, at the end of act one. They're dancing on a moving table, dancing on top of things and moving them as they're dancing. Nobody gets it right first time, and we barely get it right at all without at least three injuries. But they're all young so they bounce back.' In fact, the main cast is younger than average in the world of musicals, with the youngest, Milner, just 19, and the oldest topping out at an elderly 25. 'It's what makes High School Musical hard to cast. We need people of a considerable skill level and a considerable amount of training, who have got to be able to sing very, very well, dance superbly and be top-flight actors,' says Griffin. 'Triple threat, it's difficult to come by. Narrowing the search by saying they have to be believable as school-going age, that's a fairly tough ask.' Then there's the regimented eating, sleeping and training schedules, which don't always go down well with Griffin's young troupe. 'It's not very easy telling a 19-year-old they need to sleep. The aim is that they get a good eight to nine hours. They're dancing between eight and 10 hours a day.' Cast members also have cardio training to get their stamina and fitness levels up to speed. Rehearsals start at 9am and go to 6pm, with full-cast sessions and one on ones with the principal actors. 'It's a very, very demanding show, and in general, we need three weeks to a month in pre-rehearsal for a run,' Griffin says. Griffin himself was a 'triple threat' at one point - a singing, dancing, acting performer whose chosen poison was musicals. He's now better known for directing dramas, and has just opened a production of Evita while wrapping up Waiting for Godot in London. 'A lot of my work has been heavy work, a little bit more serious ... so when the producers first approached me for High School Musical, I did have to stop and think whether this was something I'd be any good at,' he says. 'Two and a half years later, I'm so happy I made the decision. Being part of something that is perhaps often a younger audience's first experience of being in the theatre is definitely the reason I kept coming back to it.' And the phenomenon isn't restricted to teens. When the show last played in Shanghai, Griffin says the average age of the audience was mid- to late-20s. 'It's a show that's successfully embraced true pop culture. Here's a classic tale that's a wonderful celebration of what it is to be young and passionate, and to fulfil your dreams. Cliches are cliches for very real reasons - people understand them to be true.' While the stage version of High School Musical may not stray far from its twee television roots, it is a coming-of-age tale told well on stage - and once in a while, who doesn't like being reminded that dreams are there to be fulfilled?