Phoenix, The Black Keys and Pearl Jam will headline the Polish festival

Lykke Li, Wild Beasts and Ben Howard have been added to the line-up for Heineken Open’er Festival 2014.

The bands will join previously announced headliners Phoenix, The Black Keys and Pearl Jam at the event, which takes place in Gdynia, Poland. The festival will take place from July 2-5, 2014 and today’s new announcements will all play on July 5. Tickets are on sale at and more artists will be announced over the coming months.

Other acts lined up to perform include Warpaint, Daughter and Bastille.

Last summer’s festival took place in July 2013 and was headlined by Arctic Monkeys, Kings Of Leon, Blur and Queens Of The Stone Age.

To check the availability of Open’er tickets and get all the latest listings, go to NME.COM/TICKETS now, or call 0844 858 6765