Razorlight are joined by Pendulum, Pete Doherty and White Lies
Razorlight, Elbow and Yeah Yeah Yeahs have all been added to this year's T in the Park line-up.
Other acts to be announced for the event, which takes place between 10-12 July, include Pendulum, Pete Doherty and White Lies.
Razorlight said: "We are really looking forward to be making our way back to Balado for a fourth visit. The T in the Park crowd are always up for it."
They join reunited headliners Blur at the Balado By Kinross site.
Blur played at the very first T in the Park back in 1994 and this year's return is their first gig there since 1999.
Mercury Music Prize winners Elbow will be returning for their second visit, having played King Tut's Wah Wah Tent in 2001, while Yeah Yeah Yeahs make their debut.
West London trio White Lies are also on the bill.
Last year's line-up included Rage Against The Machine, Kaiser Chiefs and The Fratellis.