The former "American Idol" contestant will offer A Night At The Rock Show Sept. 23 and Oct. 14. Show time both nights is 9:30 PM.

A Night At The Rock Show, according to the Joe's Pub website, "will feature Constantine's unique interpretations of some of the greatest rock songs of all time. He'll be backed by an all-star band."

A Brooklyn native, Constantine Maroulis is a graduate of both the Boston Conservatory and the Berklee College of Music. He trained as an apprentice at the Williamstown Theatre Festival and appeared as Roger in a tour of Rent. In addition to his performances on "American Idol," he has also been seen on "Law & Order: SVU" and in several independent films. Maroulis played a previous engagement at the Public Theater's Joe's Pub as well as a stint in Broadway's The Wedding Singer and Off-Broadway's Jacques Brel Is Alive and Well and Living in Paris. He was also seen in the Premier Theatre Company's production of Jesus Christ Superstar.

Maroulis currently stars in Rock of Ages, which plays Broadway's Brooks Atkinson Theatre.

Joe's Pub is located within the Public Theater at 425 Lafayette Street. For tickets, priced $20, call (212) 967-7555 or visit www.joespub.com.