Avenue Q Tony nominee John Tartaglia, who is currently back on Broadway in Beauty and the Beast, will be among the guests for the hour broadcast. A Tony winner for You're A Good Man, Charlie Brown, Chenoweth has also played on Broadway in Wicked, Steel Pier and Epic Proportions. She has recently taken to both the big and small screens: in TV's "The West Wing" and in the films "Bewitched," "The Pink Panther," "RV," "Running with Scissors," "Stranger Than Fiction" and "Deck the Halls."

Chenoweth reprises her 2005 New York City Center Encores! turn in the central roles of Eve, Princess Barbara and Ella in the Roundabout Theatre Company production of The Apple Tree that is rooted at Studio 54. The show began previews Nov. 29 and opened Dec. 14.

Tickets are available for The Apple Tree at Studio 54, 254 West 54th Street, by phone at (212) 719-1300 or online at www.roundabouttheatre.org.