Bullet For My Valentine have been added to the Sonisphere bill after pulling out of Hammerfest.
The new Knebworth festival will be their only UK festival appearance of 2009 after cancelling thier Hammerfest date due to recording commitments.
Speaking about their Sonisphere confirmation, the band’s Matt Tuck said: "We are really sorry to not be playing Hammerfest and apologise to fans. Hopefully, playing the very first Sonisphere will compensate. We’ll throw everything at it, you have to when you’re alongside such amazing bands at such a historic rock venue. We can’t wait, it will be a brilliant homecoming."
Metallica and Linkin Park will headline the inaugural event and it will include performances from Lamb Of God, Mastodon, Alice In Chains and more.
Sonisphere 2009 will take place at Knebworth House from 1-2 August.
Weekend camping tickets are on sale now priced at £157.50 (plus booking fee).
Other options available include a two-day pass without camping (£132.50), family camping tickets and coach options too.