Roundabout has released new casting details for their upcoming revue, Sondheim on Sondheim, which has been conceived by and will be directed by James Lapine. The previously announced Michael Arden has withdrawn due to a scheduling clash and Tom Wopat, Norm Lewis, Euan Morton and Matthew Scott will join Barbara Cook, Vanessa Williams and Leslie Kritzer onstage when the show opens at Studio 54 next year. The production aims to be a high tech, yet intimate exploration of Stephen Sondheim’s life, music and lyrics, with a major drawcard for the production being exclusive interview footage with Sondheim that will draw the sections of the evening together.