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Arctic Monkeys, Kings Of Leon and Radiohead have been announced as headliners for this year's festival.

Sheffield outfit, Arctic Monkeys are amongst the most successful bands to ever come out of Yorkshire, since announcing their arrival on the scene with debut single "I Bet You Look Good On The Dancefloor" - which was released in October 2005 and hit the No. 1 slot.

Further hit singles and two hugely-successful albums have cemented their reputation. They are not just a hit machine, though, maintaining their credibility by cocking a snook at the music industry machine by failing to turn up to collect awards. Some people have taken the band to task for their way with a publicity stunt but on their last UK festival date at Glastonbury 2007, they proved the doubters wrong with a barnstorming performance that had the critics in raptures.

Kings Of Leon

US rockers Kings Of Leon shot to fame in 2003. The three Followill brothers - Caleb, Jared and Nathan - joined together with their cousin Matthew after an itinerant childhood travelling the Southern states with their father - a Pentecostal preacher. Their four albums to date have seen them establish themselves as one of the premier rock acts on the planet.

Radiohead are the longest-established of the headliners - their roots as a school band go back to 1985! Since their debut album in 1992, "Pablo Honey", the band have built up a formidable reputation allied to massive sales although they temper it with an idiosyncratic desire to be wilfully experimental.

Radiohead's Thom Yorke

Since 1997's "OK Computer" - the album that made them as a worldwide success - the band release records on their terms and even put out a record - "In Rainbows" - solely as a download with no cover price, inviting fans to pay what they they thought the record deserved, before putting it out on the more traditional formats. They have also built up a strong reputation for their live performances.

On top of the headline names The Prodigy, Bloc Party and Leeds' own Kaiser Chiefs will also be playing the Main Stage. Kaiser Chiefs have been together since 1997 under another name but once they changed to a slightly altered version of the South African football team once captained by Lucas Radebe (former Leeds United captain - several of the band are big United fans), success wasn't far away.

Kaiser Chiefs' Ricky Wilson

That duly arrived in 2005 when their debut album "Employment" went stratospheric and singalong singles like "I Predict A Riot" and Oh My God" saw the band imprint themselves on the nation's consciousness. Two further albums and regular gigging (including an unannounced performance at 2007's Leeds Festival) has seen them maintain their status.

Around 80,000 fans will attend the Leeds festival at Bramham Park in August 2009. Tickets go on sale at 7pm on Monday 30 April for Leeds 2009. Arctic Monkeys headline the Friday night, Radiohead on the Saturday and Kings Of Leon and Kaiser Chiefs have been designated as dual headliners for Sunday. Further line-up announcements are expected soon.

Fans are advised to use the official website or authorised ticket agencies and to be extra vigilant when buying tickets online after thousands were left out-of-pocket and ticketless. Last year an estimated 2,000 people failed to gain access to the site because they did not have official tickets.

Last year's headliners included The Killers and Metallica, and 大象传媒 Leeds was at the festival for the full weekend-听 take a look at Layla Painter's report.

The Leeds festival is once again twinned with the Reading Festival with bands playing a set at both venues. The festival was originally sited at Temple Newsam Park but is now held annually at Bramham Park, near Wetherby.

Line-up confirmed so far:

Main Stage:

Friday: Arctic Monkeys, The Prodigy, Maximo Park, Ian Brown, The Courteeners, Enter Shikari, Eagles Of Death Metal

Saturday: Radiohead, Bloc Party, Yeah Yeah Yeahs, Vampire Weekend, Brand New

Sunday: Kings Of Leon, Kaiser Chiefs, Placebo, Fall Out Boy, Deftones, Funeral For A Friend

NME/大象传媒 Radio 1 Stage:

Gossip, Glasvegas, Jamie T, AFI, White Lies, Friendly Fires, Gallows, The Maccabees, Florence And The Machine, The Gaslight Anthem

Many more acts will be announced in due course.