Armin Van Buuren is among a slew of trance legends set to appear at this year's South West Four.
The Dutch DJ heads up names for The Gallery Stage which will also include Markus Schulz, BT, Tall Paul and 16 Bit Lolitas.
Today’s additions join headliners Sasha And Digweed who will play back to back as well as Layo And Bushwhacka!, Timo Mass, David Guetta and Eric Prydz.
South West Four (SW4) 2009 will take place at Clapham Common on 29 August.
Early bird tickets have already sold out by general sale passes are on sale now priced at £40 (plus booking fee).
Click here to buy South West Four tickets.
Organisers have also confirmed that there will be a huge line-up announcement this Wednesday (29 April).