Testa will play the conniving jail matron through July 17. The singing actress joins a company that features Charlotte d'Amboise as Roxie Hart, Brenda Braxton as Velma Kelly, Ray Bokhour as Amos Hart, R. Lowe as Mary Sunshine and Brent Barrett as Billy Flynn.

On Broadway Mary Testa has been seen in Barnum, Marilyn, The Rink, A Funny Thing Happened on the Way to the Forum, On the Town, Marie Christine and 42nd Street, earning Tony nominations for her work in On the Town and 42nd Street. Recently seen Off- Broadway in String of Pearls, her other theatre credits include Lend Me a Tenor, The Vagina Monologues, The Wax, From Above (Obie Award), Lucky Stiff, In Trousers, Tartuffe and On the Town (Obie Award).

Chicago won the Tony for Best Revival of a Musical in 1997 as well as awards for actors Bebe Neuwirth and James Naughton, director Walter Bobbie, lighting designer Ken Billington and choreographer Ann Reinking. The original production was directed and choreographed by the late Bob Fosse.

The Ambassador Theatre is located at 215 West 49th Street.