With a line up already boasting IRON MAIDEN, RAMMSTEIN, MГ–TLEY CRГњE and SLAYER amongst others, Sonisphere Knebworth has rolled out another five fantastic acts, showcasing the diversity and range of music it has to offer. Confirmations include: FEAR FACTORY, HENRY ROLLINS, BRING ME THE HORIZON, PAPA ROACH and PLACEBO

Many more bands and extra stages to announced in the New Year.

Tickets for Sonisphere Knebworth are on sale now at www.sonispherefestivals.com

Buy your ticket for Sonisphere Knebworth before 31st December 2009 to receive a free ticket for Sonisphere Poland to witness METALLICA, SLAYER, MEGADETH and ANTHRAX perform at the first ever 'Big Four' show.

The Bulgarian dates of Sonisphere are 22В and 23 June. Details to be announced end of January.