White Lies, Lily Allen and Santigold have been added to the line up for this year's Open'er festival in Poland.

Pendulum will also perform at the event, which will take place from the July 2nd-5th.

As previously reported, Open'er will be headlined by The Prodigy, Kings of Leon and Arctic Monkeys.

Other bands on the line up include The Kooks, The Ting Tings, Madness and Crystal Castles.

In total, over 120 acts will perform at the event, which this year will take place over four days for the first time.

(by Jason Gregory)