This Sondheim on Sondheim Playbill is signed by the legendary Tony Award-winning actor Barbara Cook, who was part of the show's limited run. Cook was best known for her roles in the original stage productions of Oklahoma! and The Music Man and was widely considered one of the premier interpreters of Stephen Sondheim's music.

Sondheim on Sondheim was an intimate musical revue of the journey, inspiration and genius behind the renowned composer and lyricist, whose acclaimed work included West Side Story, Sweeney Todd, Gypsy, Company, Into the Woods and Merrily We Roll Along. Sondheim on Sondheim debuted March 19, 2010, at Broadway's Studio 54.