It'll be the trio's first time at the festival, and lands off the back of their 2018 Culture II record, and today's new single "Position To Win".
Other artists confirmed for the 25th edition of the festival include Iron and Wine and Calexico, Masego, Cat Power, Charlotte Gainsbourg, Disclosure, Kaytranada, Superorganism, FKJ, The 1975, Metronomy, and Lana Del Rey.
Next year's festival is set to take place at Meco Beach in Sesimbra, which is south of Lisbon.
Last summer the Portugal music festival saw performances from The xx, Travis Scott, Anderson .Paak & The Free Nationals, The Vaccines, Mahalia, and more. Check out what we did at the festival last year.