Guillemots join the likes of The Verve and Muse
Guillemots, Richard Hawley, and Echo And The Bunnymen have all been added to the V Festival line-up.
The event is held at two sites in Chelmsford and Staffordshire over the weekend 16-17 August.
This year's festival will be headlined by Brit winners Muse, playing their only UK festival date, and Glastonbury headliners, The Verve.
The Young Knives and Will Young are among the other names now set to play on the Virgin Mobile Union Stage.
Further additions to the line-up include The Long Blondes, Siouxsie Sioux, Little Man Tate, Roots Manuva, Goldie Lookin Chain, Tokyo Police Club and Noah And The Whale.
They join previously announced acts including Kings Of Leon, Amy Winehouse, Kaiser Chiefs, Ian Brown, Estelle, The Kooks, The Pigeon Detectives, The Zutons, Duffy, Girls Aloud, Hot Chip and Robyn.
V Festival director Bob Angus said he was delighted to see the return of former Road to V winners Young Knives at the event.
The Young Knives return after winning Road to V competition
He said: "It was only a couple of years ago that the Young Knives won the ‘Road to V’ competition and now they return high up on the Virgin Mobile Union Stage bill.
"We’re thrilled to have them back as an established band.”
Tickets for the V Festival, which is now in its 13th year, are still available.