The production, which had originally been scheduled to begin previews Sept. 27 prior to an official opening Oct. 16, will now offer its first preview Sept. 28.
The shift is due to a scenic element modification that will require additional technical rehearsals.
Romeo and Juliet will continue performances through Nov. 10.
Along with Olsen (Impressionism) and Cihi (The Importance of Being Earnest, A Month in the Country), the cast includes Daniel Davis (La Cage aux Folles, "The Nanny") as Friar Laurence, Emmy Award nominee T.R. Knight (A Life In The Theatre, Tartuffe) as Mercutio and two-time Tony nominee Daphne Rubin-Vega (Rent, Anna in the Tropics) as the Nurse.
Additional casting includes McKinley Belcher III (Benvolio), Stan Demidoff (Paris/Sampson), Harry Ford (Gregory, Friar John, Watchman), David Garrison (Capulet), Anthony Michael Martinez (Prince), Kathryn Meisle (Lady Capulet), Dion Mucciacito (Tybalt) and John Rothman (Montague/Apothecary).
Romeo and Juliet is directed by Tea Alagić.
Tickets, a performance schedule and more information are available by calling (212) 352-3101 or visiting classicstage.org.