James Hammerstein had one child (Oscar Andrew) with his first wife Basia, two children (Will and Jennifer) with his second wife Millette Alexander and one child (Simon) with his third wife Dena (Geraldine Sherman). He died in Manhattan after suffering a heart attack. James Hammerstein Hammerstein was the son of Oscar Hammerstein II, and his Australian-born second wife, Dorothy Kiaora Blanchard. He had four half-siblings, two through each of his parents' earlier marriages: William and Alice Hammerstein, and Henry and Susan Jacobson. The best known of these was Susan, whose husbands included Henry Fonda and Richard Widmark. Hammerstein attended George School in
Oscar Hammerstein II Show, entitled "On Your Way". Throughout the rest of his college career, Hammerstein wrote and performed in several Varsity Shows. After quitting law school to pursue theatre, Hammerstein began his first professional collaboration, with Herbert Stothart, Otto Harbach and Frank Mandel. He began as an apprentice and went on to form a 20-year collaboration with Harbach. Out of this collaboration came his first musical, "Always You", for which he wrote the book and lyrics. It opened on Broadway in 1920. In 1921 Hammerstein joined The Lambs club. Throughout the next forty years, Hammerstein teamed with many other composers, including Jerome