You Me At Six and All Time Low are among the latest additions to the bill of this summer's Sonisphere festival.
Also set to play at Knebworth Park between between July 8 - 10 are Sum 41, House Of Pain, Arch Enemy, Periphery, Grinspoon and Fozzy.
As previously announced, Metallica will close the Friday night of this year's festival (July 8), Biffy Clyro will close the Saturday night (July 9) and Slipknot will close the Sunday night (July 10).
Tickets for Sonisphere are on sale now from www.aloud.com.