Kelli O’Hara, currently starring in the strong-selling Broadway musical “Nice Work If You Can Get It,” has been locked in to topline the upcoming musical version of “Far from Heaven,” getting its New York bow next year at Off Broadway’s Playwrights Horizons.

In a temporary interruption of her “Nice Work” stint, actress is already set to appear in the world preem of “Far from Heaven” this summer at the Williamstown Theater Festival. She’s the only performer confirmed for the Playwrights Horizons incarnation, although the Williamstown cast also includes Brandon Victor Dixon, Tony Yazbeck and Quincy Tyler Bernstine.

“Far from Heaven” — from creatives including scribe Richard Greenberg, composer Scott Frankel, lyricist Michael Korie and director Michael Greif — is on tap to begin perfs at Playwrights in May 2013.

Also in the casting mix at the Off Broadway company is Judith Ivey, who’ll star in the latest play by Amy Herzog (“4,000 Miles”), “The Great God Pan.” Carolyn Cantor, who also directed the Playwrights Horizons production of Herzog’s “After the Revolution,” stages the show, skedded to start perfs in November.

The org’s 2012-13 season kicks off in the fall with a production of Lisa D’Amour’s “Detroit,” toplined by David Schwimmer and Amy Ryan.