Altar Boyz is an Off-Broadway musical comedy about a fictitious Christian boy band from Ohio. It addresses and satirizes, among other things, the phenomenon of boy bands, the popularity of Christian-themed music and products in contemporary American culture.

Altar Boyz had its debut in September of 2004 at the New York Musical Theatre Festival (NYMF), in the 47th Street Theatre (Puerto Rican Traveling Theatre). The NYMF cast comprised Cheyenne Jackson as Matthew, Tyler Maynard as Mark, Andy Karl as Luke, Ryan Duncan as Juan and David Josefsberg as Abraham. Marc Kudisch performed the pre-recorded role of "G.O.D."