Also performing at the Scottish festival are We Are Scientists, Shed Seven, Scouting for Girls, Bowling for Soup, Newton Faulkner and One Night Only.
This year's bash takes place at its usual home in Balado, Kinross on July 11-13. Tickets for the event have sold out.
REM, Rage Against The Machine and The Verve have already been confirmed as the festival's headliners.
Other acts confirmed include Kings of Leon, Kaiser Chiefs, The Prodigy, The Raconteurs, The Kooks, Primal Scream, The Enemy and Panic At The Disco.