Flogging Molly, Gogol Bordello, Goldie Lookin' Chain, Gentleman's Dub Club and Amadou & Mariam are among the latest acts added to the BoomTown Fair line-up.
Flogging Molly's appearance at the Hampshire festival will be a UK festival exclusive, as will American reggae rapper Matisyahu's.
Also on the bill are Caravan Palaca, The John Butler Trio, Peatbog Fairies, Infected Mushroom, Toddla T & MC DRS, The Interrupters and The Beat.
The festival comprises eight different 'districts', each of which celebrates a variety of different music genres.
The seventh edition of BoomTown Fair takes place at Matterley Estate, Hampshire from 13 - 16 August 2015. For tickets and more information, click here. See the full line-up poster below.