The delay is "due to construction work at Studio 54, including more time for building restoration than anticipated after the five-year run of Cabaret," according to an official statement.

The long-awaited staging of the musical was previously set to begin previews March 26 for a run still slated through May 30. This production marks the musical's Broadway premiere.

Tickets are currently available at Studio 54 (254 West 54th Street), by calling Ticket Services at (212) 719-1300 or online at www.roundabouttheatre.org.

Neil Patrick Harris (as Balladeer/Lee Harvey Oswald) will lead a cast that includes James Barbour (as Leon Czolgosz), Mario Cantone (as Samuel Byck), Michael Cerveris (as John Wilkes Booth), Alexander Gemignani (as John Hinkley), Marc Kudisch (as Proprietor), Jeffrey Kuhn (as Giuseppe Zangara), Becky Ann Baker (as Sara Jane Moore), Mary Catherine Garrison (as Lynette "Squeaky" Fromme) and Denis O'Hare (as Charles Guiteau).

James Clow, Kendra Kassebaum, Ken Krugman, Anne L. Nathan, Brandon Wardell and Sally Wilfert will also play in the ensemble of the Roundabout presentation. Joe Mantello (Wicked, Take Me Out ) directs with musical staging by Jonathan Butterell (Nine). Paul Gemignani (Into The Woods, Kiss Me, Kate) serves as musical director.

The design team for Assassins includes Robert Brill (sets), Susan Hilferty (costumes), Peggy Eisenhauer and Jules Fisher (lights) and Dan Moses Schrier (sound).