Martin Garrix, Kneecap and Matt Berninger are among the new additions to Open’er Festival’s 2026 lineup

Open’er Festival has expanded its 2026 lineup to include Martin Garrix, Kneecap andMatt Berninger.

Held in Gdynia, Poland, from 1st to 4th July, the festival has also signed up ¥ØU$UK€ ¥UK1MAT$U, known for his club performances, and songwriter LP.

These artists join an already packed roster that includes The Cure, Calvin Harris, The xx, Nick Cave & The Bad Seeds, David Byrne, Halsey, and many others.

Tickets for Open’er Festival are available now from the festival’s official website.