Badly Drawn Boy and Seth Lakeman are new names added to the Eden Sessions 2011 line up this morning (16 May).
Both will play the Biotik Stage, with Badly Drawn Boy appearing on 30 June, when The Flaming Lips headline.
Liam Frost and The Travelling Band will also play on the stage that day, for charity Manchester Aid To Kosovo.
Lakeman will play on 23 June, when Primal Scream top the main stage bill.
Tickets are on sale now, priced at £37.50 per day.
The Eden Sessions take place at The Eden Project, St. Austell, Cornwall.
The other headliners for 2011 are Pendulum (June 25), Fleet Foxes (July 1) and Brandon Flowers (July 12).