The Heartbreaks, Dionne Bromfield and The Phantom Band head a host of new additions to the Latitude 2011 line-up.
Joining those three acts in playing the Sunrise Arena will be Ben Howard, Yellowire, Treefight For Sunlight, Aaron Wright and the Aprils, Yes Sir Boss, East Park Reggae Collective, Steel City Soul Club and Gabriel Deep.
Clock Opera and Sea Of Bees are new for the Huw Stephens-curated Lake Stage, with Goldierocks and Moshi Moshi DJs set to take to the decks.
The National, Paolo Nutini and Suede will headline Latitude Festival 2011, which takes place at Henham Park Estate, Southwold, Suffolk, from July 14-17.
Weekend tickets are on sale now, priced at £170.