Temples, Julio Bashmore and Neneh Cherry will also play the Portmerion event
Beck and London Grammar have been announces as the first two headliners for Festival No 6.
A third headliner is yet to be revealed for the Portmerion event, which is now in its third year.
Other acts announced today include Bonobo, Neneh Cherry with RocketNumberNine, Steve Mason, Julio Bashmore, James Holden, Danny Krivit, Andrew Weatherall, and Temples.
Festival No 6 will take place over the weekend of the 5-7 September in the village of Portmeirion, Wales, home of the cult TV series The Prisoner.
“It’s a real honour to play Festival No.6 again. Portmeirion is a beautiful and somewhat surreal location. We can’t wait to perform there again!” London Grammar said in a statement.
The full list of artists confirmed for Festival No 6 so far:
All We Are
The Brythoniaid Welsh Male Voice Choir
East India Youth
Awesome Tapes From Africa
For more information and ticket details visit www.festivalnumber6.com.