KatJonBand was a collaborative musical project between Jon Langford (guitarist for British band the Mekons) and Kat Ex (drummer for Dutch band the Ex). After collaborating on and off for decades, Langford and Ex decided to write and record songs together in 2004 after Langford performed at one of the Ex's live shows in Amsterdam. They debuted the project in 2005, touring Germany and Austria, before recording 10 songs together and releasing them as KatJonBand's eponymous debut album in 2008.