UK heavy metal pioneers DIAMOND HEAD have been added to Sonisphere Knebworth which takes place July 8th - 10th for the biggest and most exciting show of their thirty-five year career. Quite fittingly, the band have been confirmed to open for the Big Four - METALLICA, SLAYER, MEGADETH and ANTHRAX - on Friday, July 8th.

The Big Four made metal history at Sonisphere Bulgaria last year summer when they chose Diamond Head’s 'Am I Evil' to jam with all seventeen members, a testament to what a unifying force their music is.

Founding member and guitarist Brian Tatler says of the upcoming appearance:

"Diamond Head have been given the fantastic opportunity of opening for the BIG 4 at this years Sonisphere festival, Knebworth Friday, July 8th. This will be Diamond Head's biggest ever show and myself and the other band members are very excited and looking forward to what will be an historic event. Knebworth is one of those venues you only dream of playing. I saw LED ZEPPELIN there in 1979 and never imagined that one day I would be on that stage, it proves the saying 'anything is possible'! It also means I get to see my friends in Metallica and Megadeth once again which is always fun; I owe both Lars Ulrich and Dave Mustaine a beer.”

Other additions to Sonisphere Knebworth include AIRBOURNE and ARCHITECTS.

Sonisphere Knebworth line-up so far:

THE BIG 4 - METALLICA, SLAYER, MEGADETH, ANTHRAX

SLIPKNOT

IN FLAMES

MASTODON

MOTÖRHEAD

AIRBOURNE

ARCHITECTS

DIAMOND HEAD

PARKWAY DRIVE

WEEZER

BIFFY CLYRO

For more info visit Sonispherefestivals.com.