The concert production will also star Ramin Karimloo, Katie Rose Clarke, Joshua Henry, and more.
The concert kicked off Brown's tenure as an artist-in-residence at the swanky venue.
The pair will reprise their performances following the musical's premiere at American Repertory Theater.
Come on, Norbert…do us a solid.
Original stars of The Last Five Years, Parade, and The Bridges of Madison County, and 13 will perform in concert with the Tony-winning songwriter.
Songwriters Chris Miller and Nathan Tysen will debut tunes from their new musical at 54 Below.
The show opens its run at the American Repertory Theater in Massachusetts tonight.
Euan Morton will serve as the evening's auctioneer.