Delirious? emerged as a prominent Christian rock band in Britain in 1996, originating as the worship group for a local outreach event. They established their own Furious? label and garnered attention with their 1997 studio debut, King of Fools. The band's success continued with hits like "Deeper" reaching the British Top 20, leading to deals with major labels like EMI and Virgin for subsequent releases.

Throughout their career, Delirious? released a series of albums and worship compilations, including Mezzamorphis and Glo, before ultimately disbanding in 2009 after their Kingdom of Comfort album and final tour. Their impact on the Christian rock scene remains significant, showcasing their blend of faith-based lyrics and mainstream success.