Plumb, who currently stars as Miss Abigail in the Off-Broadway production playing at the Downstairs Cabaret Theatre at Sofia's, will also join Williams, who played Greg Brady on "The Brady Bunch," in a "Brady" talkback immediately following the matinee.

In addition to the classic television series, Plumb and Williams have also participated in several spinoff series and television sequels, including "The Brady Girls Get Married," "A Very Brady Christmas" and "The Bradys."

Plumb, who made her New York stage debut last October, will play her final performance as Miss Abigail on May 29.

Written by Ken Davenport and Sarah Saltzburg, with direction by Davenport, the comedy is based on Abigail Grotke's popular book by the same name that promises "classic advice for contemporary dilemmas." According to press notes, "Miss Abigail is the most sought-after relationship expert to the stars - think Dr. Ruth meets Emily Post - and in Miss Abigail's Guide to Dating, Mating, and Marriage!, she and her sexy sidekick Paco travel the globe teaching her outrageously funny 'how-tos' on dating, mating and marriage."

The Downstairs Cabaret Theatre at Sofia's is located at 221 West 46th Street next to the Lunt-Fontanne Theatre. For more information and tickets, visit www.MissAbigailsGuide.com.