"Reaper" is a song from Australian singer and songwriter Sia's seventh studio album This Is Acting (2016). The song was co-written by Sia, Kanye West, Noah Goldstein, Charles Misodi Njapa (better known by his stage name 88-Keys), and Dom $olo, originally for Rihanna's album Anti (2016). "Reaper" was co-produced by West, Dom $olo, Goldstein, 88-Keys, Jesse Shatkin, and Jake Sinclair. Sia and West had previously collaborated on the latter's song "Wolves". The song was released as the seventh and final single from This Is Acting on 29 May 2017.