The Mars Volta, Opeth, Killing Joke and more added to this year’s Sonisphere festival

The Mars Volta, Opeth, Killing Joke and more added to this year’s Sonisphere festival! Get details of the full announcement and which stages the bands are playing inside!

The Mars Volta (headlining the Saturn stage on Saturday), Opeth, Killing Joke (playing the Bohemia stage right after The Big Four), Four Year Strong (Bohemia stage on Sunday), The Black Dahlia Murder (Bohemia stage on Friday), Black Tide, Watain, Firewind, Rise To Remain, Alestorm, Six Hour Sundown and The Treatment are the latest bands to be added to this year’s Sonisphere festival!

Sonisphere 2011 will take place at Knebworth on July 8th – 10th and will be headlined by Metallica and the big four, Biffy Clyro and Slipknot with performances also confirmed from Weezer, Limp Bizkit, Architects, Motorhead, Airbourne, Sisters Of mercy, Mastodon, Volbeat, Gallows, In Flames and Parkway Drive.