Tom Mullen, who directed in Chicago, will stage the four-actor show for the York and Hilary A. Williams LLC, who are presenting the Off-Broadway premiere. Opening night is March 30.

With book, lyrics and music by Wythe, the musical is billed this way: "Tomorrow Morning is a warmly sophisticated new musical about the coupling and uncoupling of relationships. Witty, moving and emotionally complex, Tomorrow Morning speaks to anyone who has ever fallen in or out of love."

Tomorrow Morning won Chicago's Joseph Jefferson Award for Best Musical in 2009. A Chicago cast album preserves the score. Visit www.tomorrowmorningthemusical.com.

In the show, two couples are separated by time, "yet bound together by the uncertainty of impending change and the ultimately redeeming power of love," according to earlier production notes in Chicago.

An early version of Tomorrow Morning had its world premiere at London's New End Theatre in 2006. In August 2007 a first draft of an Americanized script previewed in a reading at Theatre Building Chicago's Stages Festival of New Musicals. For the Chicago 2008 premiere staging, "significant adjustments were made to the script, and songs were added and deleted to raise the dramatic stakes."

The limited Off-Broadway engagement will play to April 23 at The Theatre at Saint Peter's (619 Lexington Avenue, entrance on East 54th Street).

Cast and creative team to be announced shortly. Charissa Armon, Emily Thompson, Jonathan Rayson and Michael Mahler appeared in the Chicago run in 2008.

Visit www.yorktheatre.org for the complete performance schedule. Tickets are $67.50 and are available online at www.yorktheatre.org, by calling (212) 935-5820, or in person at the box office at the York Theatre at Saint Peter's.