The annual pet adopt-a-thon also welcomed Audra McDonald, Jessie Mueller, and a host of other Broadway favorites.
The new Gershwin musical will play Paris' Théâtre du Châtelet before coming to New York City.
The Broadway variety show will offer its second performance at 54 Below.
The evening will benefit the newly created Michael Morones Foundation.
Manhattan Concert Productions' upcoming staging of Maury Yeston and Peter Stone's acclaimed musical will take place on February 17.