Blaenavon are among the last few names for By The Sea Festival.
Other newcomers include Shame, Dutch Uncles, Snapped Ankles, Gang, Birthday Girl and AlaskaAlaska.
They join a bill that already features Everything Everything, Metronomy, The Libertines, British Sea Power, Marika Hackman, HMLTD, Dream Wife, The Rhythm Method and loads more.
By The Sea will take place from 29th September-1st October at Dreamland in Margate.