The Mars Volta, Opeth, Killing Joke Join Sonisphere Festival 2011 Line-Up

The Mars Volta have been added to the line-up for this year's Sonisphere festival.

The event, which runs from July 8-10, will mark the band's only UK performance in 2011.

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

Other new additions to the bill include Opeth, Killing Joke, Four Year Strong and Black Tide.

Tickets are on sale now.

(by Jason Gregory)

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