Arguably the greatest musical theatre composer of this century, Stephen Sondheim's work has traversed continents and disciplines. This book brings together artists, including actor Patti LuPone and director John Doyle, with top international Sondheim scholars to view the composer's work through embodied, real-world performance. Essays on singing, dancing, producing, directing and adapting Sondheim give the reader a new perspective on the performance issues and personal decisions inherent in interpreting his work. These interpretations are placed alongside an examination of 'Sondheim performing': how the composer has established a legacy and a definitive view of his art in his two published books of lyrics. The book's interdisciplinary and international approach paves the way to understanding musical theatre as a living, breathing entity.