The initial eight-week run sold out in three days, one month before performances are scheduled to begin.

The one-week extension (with all tickets $65 for that week) takes the run to July 6. Performances of the Pam MacKinnon-directed play begin May 6 toward a June 5 opening at The Peter Norton Space at 555 West 42nd Street between Ninth and Tenth Avenues.

Through the Signature Ticket Initiative, all regularly-priced tickets ($65) are available for $20 for the initial run of each production through Signature's 20th anniversary season (2010-2011).

Edward Albee's Occupant "is a portrait of acclaimed sculptor Louise Nevelson and a quest to capture a charismatic and complex artist and persona. What is the relationship between creator and creation? Who was Louise Nevelson? Only she knew."

Sets are designed by Christine Jones with costumes by Jane Greenwood and lights by David Lander. For tickets, call (212) 244-PLAY (7529). Visit www.signaturetheatre.org.