Lord Lloyd Webber’s fall show, School of Rock — The Musical is doing some test marketing with “pre-previews” at New York’s Gramercy Theatre. Although the shows were originally announced as invite-only to theatergoers culled from the lists of Broadway landlords, the composer-producer-theater-owner announced this morning that tickets are available to the general public for tonight’s 7:30 performance. “A limited number of general admission tickets will be available beginning one hour before curtain at the box office, on a first come, first served basis,” according to an announcement from Rick Miramontez, the spokesman for the show.

Based on the 2003 film of the same title, School of Rock — The Musical will feature music from the movie, as well as new songs written by Lloyd Webber and lyricist Glenn Slater, with a book by Downton Abbey creator Julian Fellowes. The show is being staged by Laurence Connor, with choreography by JoAnn M. Hunter. It’s slated to begin preview performances at the Shubert-owned at the Winter Garden Theatre on November 9, with an opening set for December 6.