Municipal Waste and Enslaved are among the latest names added to the Bloodstock Open Air bill.
Northern Ireland's Million Dollar Reload will also appear at the three-day event alongside Turisas, The Haunted, Katatonia and Wintersun, who were all announced previously.
Click here for the latest Bloodstock festival line-up.
Bloodstock Open Air 2009 will take place at Catton Hall, Derbyshire from 14-16 August.
The event, which celebrates its fifth birthday this year, is expecting 7,500 festival-goers to attend. The festival boasts two stages of live music, a market, bars, camping, metal DJs, a signing tents as well as the now infamous metal karaoke.
Tickets are already on sale priced at £99.95 for an adult weekend camping ticket. Other prices and passes are available.