Carcass, Band of Skulls and Gary Numan have been added to the Sonisphere line up.
Metallica, Iron Maiden and The Prodigy are set to headline the Knebworth festival which takes place on 4-6 July 2014.
Other bands set to play across the weekend, which this year will celebrate the 40th anniversary of Knebworth, include New Model Army, The Winery Dogs, Gallows, 65DaysofStatic and Anti Nowhere League.
Carcass’s bassist and vocalist Jeff Walker said: “A chance to play on the same day as Iron Maiden at Sonisphere? Please sign us up!”
Day tickets as well as those for the whole weekend are now available. Find them and more information on the Sonisphere site.