Sonisphere Festival headline another more bands include

Sonisphere Festival headline that including another eight more bands to the bill for the three-day rock event which take place at the Hertfordshire grounds on Friday 8 July to Sunday 10 July.

Hip-hop stars House of Pain celebration 20 year anniversary will perform at the Sonisphere Festival.

Surrey band You Me At Six will even perform at the Sonisphere Festiavl on Knebworth.

Frontman Josh Franceschi said, “We are really excited to play Sonisphere. It’s going to be a lot of fun performing at such a great rock festival.”

Canadian alt-punks Sum 41 will songs from new studio album Screaming Bloody Murder at the Sonisphere Festival at Knebworth.

Also including bands confirmed in the festival for this year are American pop-punks All Time Low, melodic extreme metallers Arch Enemy, Periphery, Australian alt-rockers Grinspoon and Fozzy.

They also join of Metallica, Biffy Clyro, Weezer, Limp Bizkit and Slipknot on the bill.

Limp Bizkit, Sisters Of Mercy Join Sonisphere Festival 2011 Line-Up

For this year's Sonisphere festival in Knebworth,two more acts have been added which include Limp Bizkit and Gallows.

In this event The Sisters Of Mercy's will appear to first UK festival in 20 years which will take place from July 8-10.

Gojira, INME, Kids In Glass Houses and One Minute Silence have also joined the bill.

Sonisphere will be headlined by Biffy Clyro, Slipknot and the Big Four - Metallica, Slayer, Megadeth and Anthrax.

Other acts on the bill include Motorhead and Mastodon.

Iron Maiden, Korn, Cavalera Conspiracy, Mastodon Confirmed For Czech Republic's Sonisphere

Iron Maiden, Korn, Cavalera Conspiracy and Mastodon have been confirmed for the Czech Republic version of the Sonisphere event, set to take place on Saturday, June 11 on rhe old armed airbase at Bozi Dar Airport, Milovice (30 km from Prague).

Early-bird tickets are priced at early bird 970 CZK (approximately $56) from February 9 until February 18. Previous year Sonisphere became the biggest event in the Czech Republic when the so-called "Big Four" of 1980s thrash metal — Metallica, Slayer, Megadeth and Anthrax -performed in front of 35,000 fans.

Weezer, Airbourne To Play Sonisphere Festival 2011

It has been announced that Weezer and Airbourne will play this year's Sonisphere festival in Knebworth.

At the festival along with Architects,both bands will make exclusive appearance.

Biffy Clyro, Slipknot and the Big Four - Metallica, Slayer, Megadeth and Anthrax will be headlining the tour at the festival which runs from July 8-10.

Other acts on the bill include Motorhead and Mastodon.

Tickets are on sale now.