The Twang are to headline the Insomniacs Ball.
They join the acts already announced, The Longcut, Blood Red Shoes, Brakes, Shakes and These New Puritans.
The event takes place at London's SeOne (Lond Bridge) on April 5. There will also be DJ sets from Riotous Rockers, Mekon, Alvin C and Infadels.
Doors are at 7.30 with the party running until 6 AM.