Grimes and Biffy Clyro are set to play this year's NOS Alive.
The Portuguese event will return this summer, with headline performances confirmed from The Chemical Brothers, Radiohead, and more.
A host of new additions were confirmed a few moments ago, with sensational 4AD artist Grimes set to perform at the festival.
Biffy Clyro will bring their set to Portugal, with other names on the bill including Two Door Cinema Club, Jagwar Ma, Vintage Trouble, and Calexico.
Tickets are on sale now.
NOS Alive runs between July 7th - 9th.