Warren Casey (April 20, 1935 – November 8, 1988) was an American theater composer, lyricist, writer, and actor. He was the writer and composer, with Jim Jacobs, of the stage musical Grease.Warren Casey was born on April 20, 1935, in Yonkers, New York to Peter L. Casey, a steamfitter, and Signe (née Ginman) Casey, a nurse. He graduated from Gorton High School, Yonkers, NY class of 1952. Casey received his Fine Arts Degree from the Syracuse University School of Visual and Performing Arts in 195