Zac Brown Band - The Grammy winners headline opening night with a rocking country set. 9:30 p.m. Thursday. Watson.
Little Feat - The boogying forefathers of Dixie-by-way-of-L.A. classic rock. 10:15 p.m. Apr. 30. Watson.
Cadillac Sky - The young outfit marries traditional bluegrass and indie-rock invention. 9:45 a.m. May 1 and 12:15 p.m. Americana Stage.
Great Big Sea - The Canadian combo spins narratives and sea chanteys May 1. 11 a.m. Watson; 3:30 p.m. Hillside; 5:45 p.m. Austin Stage.
Elvis Costello and the Sugarcanes: The rock legend follows his latest dip into Americana, "Secret, Profane, and Sugarcane," with his second Merlefest bow. 9 p.m. May 1. Watson.