Circle in the Square, New York's oldest not-for-profit theatre, will celebrate its 45th anniversary with a gala performance, auction and candlelight dinner starting 6 PM May 20 at the Circle in the Square's uptown theatre at 50th Street west of Broadway.

Gerard Alessandrini, author of the Forbidden Broadway and Forbidden Hollywood spoofs, has written the satirical revue Forbidden Circle, which will be performed that evening with an all-star cast of actors who have appeared at Circle in the Square's two theatres, in Greenwich Village and on Broadway.

A sampling of the three-dozen stars: Elizabeth Ashley, Kelly Bishop, John Cullum, Melissa Errico, George Grizzard, Anne Jackson, Frank Langella, Sylvia Miles, James Naughton, Tony Randall and Carole Shelley.

The performance will be preceded by an auction of items donated by Circle well-wishers: signed script of the film Nixon donated by Oliver Stone, and an original signed lithograph from Apollo 13 donated by Kevin Bacon.

Circle in the Square was one of the pioneers of the off-Broadway movement, a launching pad for the careers of Geraldine Page, George C. Scott, Colleen Dewhurst, Jose Quintero and Theodore Mann. Tickets range $125 to $1000. For more information: (212) 307-2730.