The Open'er Festival takes place in Gdynia, Poland from July 2 - 5 2014, and headliners include Phoenix, Pearl Jam, and The Black Keys. The festival has now announced some other fantastic additions to their lineup, including Foals, MGMT, Rudimental, and Julio Bashmore.

Foals will be playing on the Open'er Stage on 4th July and MGMT will also be performing on that stage but the day before. Rudimental are set to perform on the Here and Now Stage on the 3rd, and Julio Bashmore is on the Beat Stage on 5th July. Pusha T and Bokka are also playing the fest.

To purchase tickets and find out more information, head to their website.