Alanis Morissette, Jack Johnson, Ty Dolla $ign, Vic Mensa, and St. Vincent are among the biggest musical names in a new round of programming SXSW announced on Tuesday for its 40th-anniversary edition, which kicks off March 12. Johnson will perform a special set March 13 with Hermanos Gutiérrez — the instrumental duo of brothers Alejandro and Estevan Gutiérrez — ahead of the first public screening of his new documentary SURFILMUSIC. Johnson and the Gutiérrez brothers co-wrote the film’s score and the single “Hold On to the Light” with Mario Caldato Jr., who also produced some of Johnson’s best-known music. Mensa will pull double duty: a featured conference session exploring how music shapes cinematic storytelling followed by a showcase performance alongside hand-picked new artists. Ty Dolla $ign and Buffalo rapper Benny the Butcher will bolster the hip-hop lineup, while electronic producer ZHU and Chicago DJ and producer Hiroko Yamamura round out the festival’s dance programming.