The Foos will headline the main stage at Leeds on Friday, August 24 and at Reading on Sunday, August 26.
Kasabian and The Cure are the other bill-toppers set to perform at Reading/Leeds over the Bank Holiday weekend.
Other bands appearing on the main stage include Florence & The Machine, Paramore, The Vaccines, The Black Keys and Bombay Bicycle Club.
Classic Rock-friendly bands include Coheed And Cambria, The Gaslight Anthem and Band Of Skulls.
Priced at £197.50 for a weekend pass, tickets have now gone on sale.
Visit www.readingfestival.com and www.leedsfestival.com for further details.