WTF has also announced that Blithe Spirit by Noël Coward, directed by Maria Mileaf, will play on the Main Stage July 18-29. Janney — an Emmy winner for "The West Wing" who also appeared in A View from the Bridge on Broadway — will play Constance Tuckerman in the previously announced revival of The Autumn Garden by Lillian Hellman, directed by David Jones. The new dates for the Main Stage production are Aug. 15-26.

Foster — a Tony nominee for Little Shop of Horrors and the original star of Urinetown — will play Jack in the world premiere of Party Come Here. The musical, which has new dates of July 25-Aug. 5, has a book by Daniel Goldfarb and music and lyrics by David Kirshenbaum and is directed by Christopher Ashley. Kaitlin Hopkins, who appeared on Broadway in Noises Off and How the Grinch Stole Christmas, will play the character of Liberty.

Naughton, a Tony winner for Chicago and City of Angels, will perform Broadway classics and standards in a benefit concert on July 30. The benefit will also include a tribute to Ira Lapidus, who recently completed 11 years as president of the WTF board of trustees.

The prolific Broadway vet William Ivey Long will design costumes for the musical Herringbone, which stars B.D. Wong and has a book by Tom Cone, music by Skip Kennon and lyrics by Ellen Fitzhugh and is directed by WTF artistic director Roger Rees.

WTF's production of Crimes of the Heart on the Nikos Stage also has new dates, Aug. 8-29.

WTF in 2007 will also include the previously announced Dissonance (July 27-July 8), The Front Page (July 4-15), Villa America (July 11-22), The Corn is Green (Aug. 1-12) and The Physicists (Aug. 7-18).

Tickets are available by mail in April, online at wtfestival.org beginning June 1 and at the box office and by phone at (413) 597-3400 beginning June 4.