The singing actress will stay with the production through Dec. 2.
"I feel like this is a dream and need to be pinched," said producer Tom D'Angora in an earlier statement. "Andrea McArdle is a treasure in the Broadway community and I'm awestruck by her voice and enormous talent. We are very lucky over at NEWSical!"
The show also features Christine Pedi, Michael West, Tommy Walker, Susan Mosher, Emily McNamara and Ryan Knowles.
Rick Crom is the creator and writer of NEWSical the Musical, which is directed by Mark Waldrop and produced by D'Angora. Rounding out the creative team are Ed Goldschneider (music director), Jason Courson (set designer) and Ryan Obermeier (stage manager).
For performance schedule and more information visit NEWSicalthemusical.com.