Gene Klein (born Chaim Witz (Hebrew: ???? ????, [xa?im ?vit?s]; August 25, 1949), known professionally as Gene Simmons, is an Israeli-American musician, singer, songwriter, record producer, entrepreneur, actor, author, and television personality. Also known by his stage persona The Demon, he is the bassist and co-lead singer of Kiss, the rock band he co-founded with lead singer and rhythm guitarist Paul Stanley in the early 1970s.