Jack Heifner is an American playwright and screenwriter, best known for his work in theater. He gained prominence with his play Vanities, which premiered in 1976 and has since become a staple in American theater. His writing often explores themes of friendship, identity, and the complexities of human relationships. In addition to Vanities, Heifner has written several other plays and screenplays, contributing to both stage and film. His works have been performed in various theaters across the United States, showcasing his talent for creating engaging and relatable characters. Heifner's contributions to the arts have made him a respected figure in the world of theater.