Amen is a hardcore punk-influenced band] formed in 1994. The band has an almost constantly rotating lineup, with founder Casey Chaos remaining as the only constant member throughout. Chaos writes all the music and lyrics, and performs all vocals and instruments (bar drums, since the album Amen) for studio recordings.

They are particularly popular in the United Kingdom and have previously been voted "Overall Best Band in the World" and "Best Live Band in the World" by readers of Metal Hammer magazine. Amen is known for their live shows and singles "Coma America", "Price of Reality" and "California's Bleeding". Casey Chaos also received a Grammy for co-writing the best Hard Rock song of the year.