Why is everybody talking about it?The line-up includes The Cure (singer Robert Smith, above), Kasabian, Foo Fighters, Florence and the Machine, Metronomy, Justice, The Black Keys, Bombay Bicycle Club and Katy B.
Is it worth the hype? Yes, it is a highlight of the summer festival circuit.
Watch out for? Lots of acts including Hawk Eyes and Family of the Year to perform on the BBC stage intended to showcase new talent.