Sonisphere have announced You Me At Six, All Time Low, Sum 41, House of Pain, Arch Enemy, Periphery, Grinspoon and Fozzy will be playing at Knebworth in 2011.
They join the line-up that already includes acts such as The Big 4, Motorhead, Slipknot and Biffy Clyro.
Sonisphere takes place 8 - 10 July 2011.