They'll share a headline slot with Paramore.
Queens of the Stone Age have been announced as co-headliners with Paramore for Reading and Leeds festivals this year. They’ll play Reading on the Friday night and Leeds on the Saturday.
Elsewhere, You Me At Six, Imagine Dragons and Deaf Havana have also been added to the main stage along with many more bands added to other stages, including Enter Shikari, Lower Than Atlantis and Drenge.
Arctic Monkeys and Blink 182 headline the main stages on the Saturday and Sunday nights.
Reading and Leeds festivals 2014 take place 22nd - 24th August.