O'Hara, a four-time Tony nominee, currently a Best Actress nominee for Nice Work If You Can Get It, will test the 1950s-set Far From Heaven this summer in a July 19-29 tryout at Williamstown Theatre Festival in Massachusetts. PH will present the show's full world premiere in New York City in May 2013. The score is by Michael Korie and Scott Frankel, whose Grey Gardens premiered at PH. Michael Greif directs. The libretto, drawing on the film of the same name, is by Tony winner Richard Greenberg (Take Me Out).

This marks O'Hara's first Playwrights Horizons production since 2003's My Life with Albertine.

Far From Heaven — the tale of a suburban Eisenhower-era housewife whose life is upended when she learns that her husband is gay, pushing her into another taboo relationship — was commissioned by Playwrights Horizons under the auspices of the Playwrights Horizons Musicals in Partnership Initiative with leadership funding provided by the The Andrew W. Mellon Foundation. Through this initiative, the musical will have what's billed as a Preview Production run at the Williamstown this summer prior to its life at Playwrights Horizons in May 2013.

A replacement for O'Hara during her summer leave of absence from Broadway's Nice Work (dates to be revealed) will be announced shortly.

Ivey, a two-time Tony winner for Steaming and Hurlyburly, will star in The Great God Pan by Obie winner Amy Herzog (After the Revolution at PH, 4000 Miles), directed by Carolyn Cantor (After the Revolution and Essential Self-Defense at PH, Pumpgirl, Orange Flower Water). The production will begin performances in November 2012. Additional casting will be announced. Here's how PH bills the play: "Jamie's life in Brooklyn seems just fine: a beautiful girlfriend, a budding journalism career, and parents who live just far enough away. But when a possible childhood trauma comes to light, lives are thrown into a tailspin. Unsettling and deeply compassionate, The Great God Pan tells the intimate tale of what is lost and won when a hidden truth is unloosed into the world."

Read Playbill's previous season announcement story about Playwrights Horizons' new season.

For more about season ticket packages, visit TicketCentral.com or PlaywrightsHorizons.org.