Franz Ferdinand are among the latest names added to the Hurricane and Southside bills.
'I Kissed A Girl' pop starlet Katy Perry, Ben Harper And Relentless 7, Gogol Bordello, Blood Red Shoes and The Sounds will also be appearing.
Today's confirmation join line-ups that already boast Kings Of Leon, Disturbed, The Wombats and more. Both festivals share the same line-up over two different site, much like Reading and Leeds Festivals in England.
Click HERE for the latest line-up.
Hurricane 2009 will take place at Eichenring Scheessel, while Southside Festival 2009 will be held at Neuhausen ob Eck, Tuttlingen.
Early bird tickets for both events are on sale now priced at 109 Euros.
Click HERE to buy Hurricane tickets.
Click HERE to buy Southside Festival tickets.