Fisher-Wilson succeeds Carol Woods as Matron "Mama" Morton. The singing actress is scheduled to stay with the long-running production at the Ambassador Theatre through Jan. 1, 2009.
The musical revival also celebrates its 12th anniversary and its 5,000th performance on Broadway Nov. 14.
Chicago currently features Charlotte d'Amboise as Roxie Hart, Brenda Braxton as Velma Kelly, Tom Hewitt as Billy Flynn, Raymond Bokhour as Amos Hart and R. Lowe as Mary Sunshine. (As previously announced, "Office" star Melora Hardin will begin performances as Roxie Hart Dec. 29.)
LaVon Fisher-Wilson received the Suzi Award for her portrayal of Gran Mimi in Jelly's Last Jam at the Alliance and has also been seen in productions of Once on This Island; Crowns; Don't Bother Me, I Can't Cope; Dreamgirls; Tommy; and Beehive.
Chicago plays the Ambassador Theatre, located at 215 West 49th Street.
Visit www.chicagothemusical.com for additional information.