Karr will be joined by special guests Catherine Brookman (Hair), Brian Gallagher, John Arthur Greene (West Side Story) and vocal coach and music director Trapper Felides.
Matt Hinkley will be music supervisor for Karr and his accompanying rock band during the evening, which will be presented by John Johnson and Kaitlyn Fine in association with Sh-K-Boom/Ghostlight Records.
The concert will mark Karr's debut as a singer/songwriter. In addition to performing his own music, Karr, who also appeared in the recent Fringe Festival production of Veritas, will sing covers of hits by OneRepublic, Hanson, Eric Hutchinson and others.
Joe's Pub is located in the Public Theater at 425 Lafeyette Street. Tickets are $15 in advance and $18 at the door; to order, call (212) 967-7555 or visit joespub.com.