A Perfect Circle is an American rock band formed in 1999 by guitarist Billy Howerdel and lead vocalist Maynard James Keenan. The band is known for its unique blend of alternative rock, art rock, and progressive rock, characterized by melodic instrumentation and introspective lyrics. Their debut album, Mer de Noms, was released in 2000 and received critical acclaim, establishing the band as a significant presence in the rock music scene. The band's lineup has changed over the years, but it has consistently included talented musicians. A Perfect Circle is recognized for its thought-provoking themes and atmospheric sound, often exploring topics such as love, loss, and societal issues. They have released several albums, including Thirteenth Step and Eat the Elephant, further solidifying their influence in the music industry.