Unknown Mortal Orchestra (UMO) is a New Zealand psychedelic rock band formed in Auckland, primarily composed of singer, guitarist, and songwriter Ruban Nielson, and bassist Jake Portrait. The band is currently based in Portland, Oregon. Nielson started the band in 2010. The band's first album was released in 2011 on Fat Possum Records; four subsequent studio albums have been released on Jagjaguwar, the most recent being IC-01 Hanoi (2018).