Alexisonfire (pronounced "Alexis on fire") was a five-piece, post-hardcore band that formed in St. Catharines, Ontario, Canada in 2001. The band consisted of George Pettit (vocals), Dallas Green (guitar, piano, vocals), Wade MacNeil (guitar, vocals), Chris Steele (bass guitar), and Jordan Hastings (drums, percussion).

They describe 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", also the inspiration for their debut 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 as well as earning their self-titled debut album a gold certification in Canada.