The evening, which is entitled Raise the Roof! Recover, Rebuild, Rejoice!, begins at 9:30 PM.
Scheduled to appear are Saycon Sengbloh, Maya Days, Bryonha Marie Parham, Anika Larsen, Charlie Alterman, Kelly McCreary, Natalie Joy Johnson, Josh Tower, Andrew Kober, Kevin Smith Kirkwood, Nicole Lewis and Tally Sessions.
"Losing the Old Barn was a great loss, both to our theatre in New Hampshire and to our extended Weathervane family in New York City," said artistic director Jacques Stewart in a previous statement. "We typically hire our company of 11 actors from New York's large pool of union talent. When our Alumni Association heard about the fire, the response was immediate. This benefit on April 30 will ensure our 2012 summer season goes up without a hitch on July 7."