Underworld became popular in 1996 with the release of Born Slippy, a song which appeared on the soundtrack of Trainspotting, starring Ewan McGregor.
As usual, Positivus will take place in balmy Salacgrīva by the Baltic coast on July 26 and 27. British alternative rock band The 1975 and Australia's Cut/Copy are also to perform this year.
A three-day event for the past few years, this year Positivus will last only two days.