The stars of Broadway's Sondheim on Sondheim (featuring Barbara Cook, Vanessa Williams, Tom Wopat, Norm Lewis, Euan Mortan, Erin Mackey, Leslie Kritzer and Matthew Scott) have had plenty of time to settle into their current home at Roundabout Theatre Company's Studio 54, where the show opened on April 22. Each day is the same: sign in, perform, sign out, sign autographs. While audiences get an up-close-and-personal view of these top-notch performers each show, few rarely get to see them before the lights go up. Broadway.com dropped by the theater recently to catch the stars in the quieter, more personal moments leading up to the call for "places." Email, crossword puzzles, guitar practice—you'd almost never know there's a packed house waiting for them. Click through for an intimate visit with Sondheim on Sondheim.