Deadmau5 will headline the Dance Stage at this year's Reading and Leeds Festivals.
Other names taking on Leeds on the Saturday (29 August) before moving down to Reading for the Sunday (30 August) will be Chase And Status, MSTRKRFT and Vitalic will make their only UK festival performance of 2009 at the events.
Female rapper Lady Sovereign, The Crystal Method and The Qemists have also been added to the bill along with Chipmunk, 3Oh!3 and Master Shortie.
Das Pop will only perform at Reading Festival, while Mixhell will only play up in Leeds. L’Armour L’Armourge will also play over the weekend.
Today’s additions join headliners Kings Of Leon, Radiohead and Arctic Monkeys as well as The Gossip, Glasvegas, Kaiser Chiefs and more.
Click here for the latest Reading Festival line-up.
Both run from 28-30 August and share the same line-up.