Sonisphere has named the first acts on the 2010 bill.
Heavy metal icons Iron Maiden are to play their only UK gig of 2010 at the Sonisphere festival.
The group will headline the Knebworth event alongside other heavyweights such as Slayer, Rammstein, Motley Crue and Iggy & The Stooges.
Iron Maiden frontman Bruce Dickinson said: "Knebworth has been the home of so many legendary concerts going back many years it really will be a privilege to play there."
He also claimed that the band is looking forward to appearing at the event, as they have not played in the UK for more than two years.
German industrialists Rammstein also pointed out that Sonisphere 2010 will their first UK festival appearance and thanked their British fans for their continued support.
It was also revealed that thrash favourites Anthrax will play next year's event, with guitarist Scott Ian commenting: "We are still buzzing from our insane show at Knebworth last summer."
Last year, a range of metal luminaries played Sonisphere, including Nine Inch Nails, Metallica, Anthrax and Killing Joke.
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