Christopher "Chris" Stein (born January 5, 1950) is the co-founder and guitarist of the new wave band, Blondie. He is also a producer and performer for the classic soundtrack of the hip hop film, Wild Style, and writer of the soundtrack for the film Union City. A keen photographer, Stein has taken thousands of images of punk musicians, H.R. Giger and Debbie Harry.In addition to being the sole writer of the Blondie hit song, "Sunday Girl", Stein co-wrote numerous hits with Blondie's lead vocalist, Deborah Harry, including "Heart of Glass", "Picture This", "Dreaming", "Island of Lost Souls", "Rapture", and "Rip Her to Shreds". Stein also ran the Animal Records label between 1982 and 1984.In 1983, Stein was diagnosed with pemphigus vulgaris, a rare autoimmune disease of the skin, but he has since regained normal function. Stein had developed a mild form of the disease, and was able to control it with a program of steroids. As of 2014, he was still touring and recording with Blondie.