Circle Jerks (stylized as Ciʀcle JƎʀᴋs) are an American hardcore punk band, formed in 1979 in Los Angeles, California. The group was founded by former Black Flag vocalist Keith Morris and Redd Kross guitarist Greg Hetson. To date, Circle Jerks have released six studio albums, one compilation, a live album and a live DVD. Their debut album, Group Sex (1980), is considered a landmark of the hardcore genre.