Alexisonfire (pronounced as "Alexis On Fire") is a five-piece post-hardcore band that formed in St. Catharines, Ontario, Canada in 2001. The band consists of George Pettit (vocals), Dallas Green (guitar, vocals), Wade MacNeil (guitar, vocals), Chris Steele (bass), and Jordan Hastings (drums).

The band describes their music as "the sound of two Catholic high-school girls in mid-knife-fight" (a reference to their song "A Dagger Through the Heart of St. Angeles", which was also the inspiration for their album cover art). When the band came out of the underground like an "utterly captivating car-accident-in-progress" in late 2001, it was enough to impress critics and attain a gold certification for their self-titled debut album.