Jo Bonney directs the ensemble work, featuring Robert Sean Leonard, Parker Posey and Pamela Payton-Wright. Performances began Jan. 16 and word spread quickly that the drama, about former '60s radicals reuniting 10 years after college, was something special. The play opened Feb. 3 at the Peter Norton Space, 555 W. 42nd Street.

The revival is part of Signature's season devoted to Wilson, who penned Talley's Folley, Burn This, THE HOT L BALTIMORE and more.

Fifth of July was originally scheduled to close on March 9. The cast checked its schedules and the extension came through. Leonard begin rehearsals for a Broadway revival of Long Day's Journey Into Night in March.

Here's how Signature bills the work: "On a hot Independence Day in the late '70s, a widow puts her husband's ashes in the fridge for safekeeping, a handsome botanist rediscovers a long-lost variety of rose, and a young girl dreams of being Betty Grable and Marie Curie. The first play written in Wilson's celebrated Talley trilogy, Fifth of July chronicles the two-day reunion of a group of '60s radicals in their small hometown of Lebanon, Missouri. These friends and lovers confront the consequences of their past choices and try to reconcile the disappointments of lost dreams with renewed hope for the future."

The cast features Jessalyn Gilsig (June), Michael J. X. Gladis (Jed), David Harbour (John), Robert Sean Leonard (Ken), Sarah Lord (Shirley), Ebon Moss-Bachrach (Weston), Pamela Payton-Wright (Sally) and Parker Posey (Gwen). For information, call (212) 244-PLAY or visit www.signaturetheatre.org.