The conversation will take place following the Tuesday, November 5 performance.
The veteran singer will perform to benefit the Only Make Believe charitable organization.
Lippa's guests will also include Willemijn Verkaik and Carrie Hope Fletcher.
Magician Janne Raudaskoski brings his show for all ages to New York for its American premiere.
Broadway's biggest stars head south for the winter.
Emily McNamara, Randy Rainbow, and Glittered & Mauled will also join in the festivities.
Classic stories and lively puppet shows are showcased in four original works for kids.
Tom Sawyer and Will Holt's Jack and Raymond De Felitta, Kim Oler, and Alison Hubbard's Buddy's Tavern will receive New York premieres.
The events will spotlight composers and lyricists such as Michael John LaChiusa, Henry Krieger, and Carolyn Leigh, among others.
The cast of the Irish Repertory Theatre production will also include Kristin Griffith, Ian Holcomb, and Peter Maloney.