Portishead will join
The Strokes,
Arctic Monkeys at next year's Benicassim festival in Spain.
Primal Scream will also top the bill at the event, which is due to take place from July 14-17 2011.
In previous years the festival has been headlined by Oasis, Gorillaz and The Prodigy.
Meanwhile, Portishead have also been confirmed as curators for a special all All Tomorrow's Parties event in London next summer.
Tickets for the festival are on sale now.
(by Holly Frith)