Boot-stomping Bellowhead and BBC Radio 2's Best Duo Spiers and Boden are among the first acts for the festival, which runs from 13-17 July at Larmer Tree Gardens, Salisbury.
They are joined on the line-up by Skinny Lister, Rosie Doonan, My First Tooth and folk duo Show of Hands.
Polly and the Billets Doux, Ahab, The Mopes and Disco's Out (Murder's In) are the last of the new bands, who join Jools Holland and his Rhythm and Blues Orchestra on the Larmer Tree line-up.
Tickets for the event, which will see over 80 acts perform on six stages, are available at various prices for a single day, with a five-day ticket costing £197.
Discounted prices are available for under-18s.