Panic! at the Disco (known as Panic at the Disco between 2008 and 2009) is a rock band formed in Las Vegas, Nevada, in 2004. The band comprises Brendon Urie (vocals) and Spencer Smith (drums). In July 2009, both Ryan Ross (guitar, vocals) and Jon Walker (bass) left the band, citing creative differences as the reason for their depature. They have since formed a new band, entitled The Young Veins.