They welcomed hundreds of children and their parents to Gracie Mansion for a Halloween celebration.
The party included face painting, storytelling and a magic show.
Okay, you have to admit, this is scary. #GracieHalloween pic.twitter.com/GktkVr6ANQ
— Chirlane McCray (@Chirlane) October 30, 2015
There were some very creative costumes on the children who all seemed to have a great time.