Martin takes on the role of Berthe, for which she won a 2013 Tony.
The cast will also include Christopher Fitzgerald, Isaiah Johnson, and David Turner.
The 54 Below event will feature performances and anecdotes from "everyone's favorite newsboys (and girls)."
The historical musical features a Tony-winning book and score by Alfred Uhry and Jason Robert Brown.
The acclaimed composers will present concerts and classes as part of WPPAC's Creating Broadway Series.
MCC Theater will present the world premiere of LaBute's latest comedy this fall.
Robert O'Hara directs his play at Playwrights Horizons.
Marc Kudisch, Jenn Lyon, and more star in this humorous new play.
Manhattan Theatre Club announced complete casting for the world premiere of Donald Margulies' play.