The actors and crew will host a small backstage party at intermission during Friday evening's performance to mark the moment when it becomes the fourth longest-running show in Broadway history.
The cake-cutting and champagne toast will technically be a little premature: The matinee on Saturday will actually be the show's 6,138th performance, the moment it jumps over the original version of "A Chorus Line" into the record books.
The achievement also means "Chicago" becomes the longest-running American show in Broadway history. Ahead of it are "The Phantom of the Opera," ''Cats" and "Les Miserables," all British imports.
Copyright 2011 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.