Warren Casey (April 20, 1935 – November 8, 1988) was an American theater composer, lyricist, writer, and actor.
Casey quit his day job as a department store lingerie buyer and the team headed to New York City to collaborate on what would become Grease, which opened at the Eden Theatre in downtown Manhattan, moved to Broadway, and earned him a Tony Award nomination for Best Book of a Musical.
Casey's acting credits include the original production of David Mamet's Sexual Perversity in Chicago in 1974 at the Organic Theater Company.
Under Stuart Gordon's direction, Casey created the role of foul-mouthed self-styled makeout artist Bernie Litko, delivering a comically outrageous performance tinged with pathos.
He wrote (with Jim Jacobs) Island of Lost Coeds, a two-act musical, produced at Columbia College Chicago under the direction of Sheldon Patinkin.