Barbara Robertson is an Americanactress and singer. She plays the role of "Jan the Unnamed" for the American Theatre Company's Pre-Broadway Chicago production of "Yeast Nation". Recently[when?] she played the role of Mame at the Drury Lane Theatre.
She may be most well known for playing Madame Morrible in the Chicago production of Wicked. She first played the role from May 8, 2007 through June 25, 2008, and again to close out the production from November 18, 2008 until the final performance on January 25, 2009. She also played a limited engagement with the touring production of the show on its stop in Chicago, which ran from December 1, 2010 through January 23, 2011.