Pulp head up the latest names for Heineken Open'er 2011, which takes place at Gdynia, Poland from 30 June to 3 July.
Paolo Nutini and The Wombats will also perform.
They join the likes of Coldplay, Caribou, Foals, M.I.A. and many more, who were all announced previously.
Four-day camping tickets are on sale now, priced at £85/410PLN, with day tickets and three-day packages also available.
Click here to buy Heineken Open’er tickets.