Tinie Tempah, We Are Scientists and Magnetic Man are among the first acts confirmed for Beach Break Live 2011, which will take place at Pembrey Country Park, South Wales from 16-20 June.
Katy B, Professor Green and Totally Enormous Extinct Dinosaurs have been added along with Ed Sheeran, Frankie And The Heartstrings, Yasmin and Ash Grunwald.
Maverick Sabre, VF Ones To Watch The Milk, Florrie, Will And The People and Rodney Brannigan have also been announced alongside Brother And Bones, Winterhours and Dry The River.
Gypsy And The Cat, Gabrielle Aplin and Coda will also perform live.
Hitting the decks will be Mark Ronson, Zane Lowe and Sub Focus (Live) as well as Nero, Ms Dynamite, DJ Yoda and Joker Ft. Buggsy & Scarz.
Shy FX, London Elektricity, Jaguar Skills and Urban Knights are set to appear as well, along with Marc Roberts, Mystery and SDM.
More acts are expected in the coming weeks.