Entitled If Only/Only If, the 7:30 PM concert at the Lucille Lortel Theatre will feature the vocals of Joel Blum, Matt Cavenaugh, Anthony Holds, Deven May, Elenda Shaddow, Howie Smith and Clark Thorell. A reception at the Sweet Rhythm Jazz Club (88 Seventh Avenue South) will follow the performance. Composer Peter Mills, a 2002 Jonathan Larson Grant recipient, has penned The Flood, The Alchemists, Illyria and Lonely Rhymes. The concert of his music will benefit the Prospect Theatre Company's upcoming production of the new musical The Pursuit of Persephone, which is based on F. Scott Fitzgerald's "This Side of Paradise."

The Lucille Lortel Theatre is located at 121 Christopher Street. Tickets, priced $25 (balcony seating), $50 (orchestra side seating, VIP post show reception) and $100 (orchestra seating, VIP post-show reception and goody bag), are available by calling (212) 279-4200 or by visiting www.ticketcentral.org.