Warren Ellis (born 14 February 1965) 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.