fun. is an alternative pop-rock band which formed in New York City, New York, United States in 2008. The band consists of Nate Ruess (vocals), Andrew Dost (keyboard, bass) and Jack Antonoff (guitar, trumpet). Ruess is a former member of The Format, Andrew Dost is a former member of Anathallo and Jack Antonoff is a member of Steel Train. The band also includes touring members Nate Harold (bass), Emily Moore (keyboards, guitar) and Will Noon (drums).
The band has released two albums: Aim and Ignite (2009) and Some Nights (2012). Their single We Are Young (featuring Janelle Monáe) peaked at #1 on the Billboard Hot 100 and #2 on the Billboard Alternative Songs chart.