Arctic Monkeys head up a slew of acts confirmed for Rock Werchter 2011, when the event returns to Werchter in Belgium from 30 June to 3 July.
Portishead, PJ Harvey, Elbow and The Gaslight Anthem are also confirmed alongside Robyn and Two Door Cinema Club.
They join Coldplay, Kings Of Leon, Iron Maiden and The Chemical Brothers who were announced previously.
Rock Werchter 2011 tickets are on sale now priced between 76 and 195 Euros.
Click here to buy Rock Werchter tickets.
More acts are to be announced in the coming weeks.