Sparks consists of brothers Ron (left) and Russell Mael

The Californian brothers, who began their career in the 1970s, will make their debut at an outdoor music event.

The band are expected to perform their current album in its entirety, plus material from its previous 19 releases.

Sparks reached their UK chart zenith with This Town Ain't Big Enough For Both Of Us, which reached number two in May 1974.

'New experience'

The duo scored a minor hit with the song in 1997, which was a collaboration with US rock band Faith No More.

"Playing a festival will be a new experience for us but it is one we are looking forward to," said the band's Russell Mael.

"It will be great to put on our show in this outdoor location and for an audience who may not have seen us play before," he added.

The Big Chill will be held at Eastnor Castle Deer Park in the Malvern Hills on 4-6 August.

Other artists scheduled to play the event include Nizlopi, who scored a Christmas chart hit with The JCB Song and Malian duo Amadou and Mariam.

The Big Chill emerged in 1994 from an all-day club event at London's Union Chapel.

The first outdoor festival, which attracted 700 people, took place the following year in the Black Mountains of Wales, settling at Eastnor Castle in 2002.