Warren Ellis is an Australian musician and composer. He is a member of the rock groups Dirty Three and Nick Cave and the Bad Seeds. He also performed with the band Grinderman until its disbandment in 2013. He has also composed film scores with long-time friend, collaborator and band-mate Nick Cave. Ellis plays the violin, piano, accordion, bouzouki, guitar, flute, mandolin, mandocello and viola. He has been a member of Nick Cave and the Bad Seeds since 1994.

Dirty Three are an Australian instrumental rock band, consisting of Warren Ellis, Mick Turner and Jim White (drums), which formed in 1992. Their 1996 album Horse Stories was voted by Rolling Stone as one of the top three albums of the year. Two of their albums have peaked into the top 50 on the ARIA Albums Chart, Ocean Songs (1998) and Toward the Low Sun (2012). During their career they have spent much of their time overseas when not performing together. Turner is based in Melbourne, White lives in New York, and Ellis in Paris. Australian rock music historian Ian McFarlane described them as providing a "rumbling, dynamic sound incorporated open-ended, improvisational, electric rock ... minus the jazz-rock histrionics". In October 2010, Ocean Songs was listed in the book 100 Best Australian Albums.