MOSCOW (AFP) - Russias historic Bolshoi Theatre will finally raise its curtain on Friday after a massive, six-year overhaul that aims to create a state-of-the-art space for its world-renowned ballet and opera troupe. Stars including prima ballerina Svetlana Zakharova and French soprano Natalie Dessay will tread the new stage at a lavish gala attended by Russian President Dmitry Medvedev as well as major arts figures. The invitation-only gala in Moscow will be broadcast on a giant screen to crowds outside the theatre as well as airing on Russian television and in cinemas worldwide, the theatres director Anatoly Iksanov said. Other big names scheduled to appear include opera stars Dmitri Hvorostovsky and Angela Gheorghiu as well as the Bolshois wildly popular young dancers Natalya Osipova and Ivan Vasilyev, a real-life couple famed for their gravity-defying leaps.