More acts added, including I Blame Coco, Clientele and Efterklang
Ash, who have sold 8 million albums around the globe and Alex Under who is on his own record label, will perform at Spain's Benicassim Festival this summer.
The updated line up also plays host to a number of artists including multi-talented musician Brendan Benson, The Clientele, indie-pop stars Efterklang, Funk Agenda, I Blame Coco who started working on her album at the age of 15, as well as Jack Beats, The Pinker Tones, Puggy and energetic underground band The Ruskins.
The line up currently includes Kasabian, Vampire Weekend, DJ Shadow, The Prodidgy, Gorillaz, Lily Allen, Dizzee Rascal, Foals and loads more big names.
Tickets are priced at £160 including free camping. VIP passes can be purchased for 300 euros.
Benicassim 2010 will take place at Benicassim in Northern Spain from 15-18 July.