Suzanne Vega, Annie Golden, Chip Zien, and Amy Spanger will also perform at the 54 Below event.
The raucous event will feature brand-new holiday songs as well as old favorites.
The Atlantic Theater Company production also features Daniel Everidge and Betsy Morgan.
The two actors are coming together in a new musical from a team that includes the Tony-nominated cocreator of [title of show] and a couple of Story Pirates.
Nick Blaemire, Rebecca Naomi Jones, and Katrina Rose Didericksen also take the stage at 54 Below.
The new musical at Atlantic Theater Company is written by Hunter Bell, Lee Overtree, and Eli Bolin.
Tunick was honored at the annual gala of Arlington's Signature Theatre.