Mary Testa will join previously announced stars Will Chase, Merle Dandridge, Ed Dixon, Roderick Hill, and Celia Keenan-Bolger in a concert version of the musical Working, to take place at 8pm on Monday, February 19 at the Zipper Theater. All proceeds benefit the Actors' Fund of America.

The show will be directed by Gordon Greenberg. Working has a book by Stephen Schwartz, which is based on Studs Terkel's 1974 book of the same name, which looked at a cross-section of Americans. It features a score by Schwartz, Craig Carnelia, Micki Grant, James Taylor, Susan Birkenhead, and Mary Rodgers. Among its best known songs are "Millworker," "Just a Housewife," "If I Could've Been," and "Fathers and Sons."

The show will feature musical direction by Steve Marzullo, lighting design by Jeff Croiter and Jeff Carnevale, and sound design by Peter Fitzgerald. Greenberg's directing credits include Jacques Brel is Alive and Well and Living in Paris, Slut, and Cam Jensen. His production of Pirates, recently seen at the Goodspeed Opera House, will play the Paper Mill Playhouse later this year.

Chase most recently starred on Broadway in High Fidelity. Dandridge is currently on Broadway in Tarzan. Dixon's many stage credits include Under the Bridge. Hill was recently seen on Broadway in Butley. Keenan-Bolger is currently on Broadway as Eponine in Les Miserables. Testa is a two-time Tony Award nominee for 42nd Street and On the Town.