John Milton Cage Jr. mawaki ne na avant-garde Ba'amurke, masanin kida, marubuci, kuma mai fasaha. Ya kasance babban jigo na ƙungiyar avant-garde bayan yaƙi kuma an fi saninsa da aikinsa na majagaba na rashin kayyade kida, kiɗan lantarki, da haɓakar piano da aka shirya. Ayyukan Cage yana da alaƙa da ƙin yarda da tarurrukan kiɗa na ƙasashen yamma na gargajiya da kuma sha'awar shigar da dama da bazuwar cikin abubuwan da ya tsara. Har ila yau, an san shi da rubuce-rubucen kiɗa da haɗin gwiwarsa da masu zane-zane, masu rawa, da sauran masu yin wasan kwaikwayo. An haifi Cage a ranar 5 ga Satumba, 1912, a Los Angeles, California, kuma ya mutu a ranar 12 ga Agusta, 1992, a birnin New York.