Biffy Clyro to headline Reading and Leeds festival
Biffy Clyro are the second headliner to be confirmed for this year's Reading and Leeds festivals.
System Of A Down, Foals and Bring Me The Horizon have also been added to the main stage line-up.
Fall Out Boy, who recently announced their return from a break, will also perform.
Eminem has already been confirmed as a headliner for the event which takes place between Friday 23 and Sunday 25 August.
Nottingham-based singer Jake Bugg will also play the NME/Radio 1 stage.
Other artists already confirmed include Alt-J, Sub Focus and Deftones.
Biffy Clyro recently scored their first UK number one with their sixth album Opposites. It sold around 70,000 copies during its first week on sale.
As previously announced, two extra stages will be added at this year's Reading and Leeds events.
There will be a BBC Radio 1 dance stage and the BBC Radio 1Xtra stage, headlined by London grime collective Boy Better Know.
Last year 87,000 fans at Reading's Richfield Avenue site and 75,000 at Leeds' Bramham Park saw performances from headliners Foo Fighters, The Cure and Kasabian.