When the Roundabout Theatre decided to honor American composer-lyricist Stephen Sondheim with a gala April 30, many of the stars who have worked with the company were on hand to celebrate the man who created Follies, Sweeney Todd, Into the Woods, Company and A Funny Thing Happened on the Way to the Forum. Design for Living's Alan Cumming was there along with Matthew Broderick, Sarah Jessica Parker, Natasha Richardson, Marin Mazzie, Donna Murphy, Veanne Cox and Nathan Lane.