The Complex were an Irish punk rock band formed in 1979 in Dublin. The band's membership consisted of Liam Ó Maonlaí (vocals, guitar), Kevin Shields (guitar), Colm Ó Cíosóig (drums) and a bassist known only as Mark. The Complex disbanded in 1981 after Ó Maonlaí's departure. Although unsuccessful on the Dublin post-punk music scene, members of The Complex later formed successful alternative rock bands, including My Bloody Valentine and Hothouse Flowers.