Patti LuPone to Guest Star on "30 Rock"

That shy, demure star of light musical fare will be guest starring on 30 Rock as the mother of Judah Friedlander's character Frank. Not sure when the episode is airing, but it's sure to be something zany and off-the-wall. Perhaps they can have a mother from hell showdown between her and Elaine Stritch's Colleen...?