The Jellicle Ball is a central event in the musical Cats, created by Andrew Lloyd Webber. It is a gathering of the Jellicle cats, who come together to celebrate their lives and share stories. The ball takes place on the night of the Jellicle Moon, a special time when the cats can present themselves to Old Deuteronomy, their wise leader. During the Jellicle Ball, each cat has the opportunity to showcase their unique personality and talents. The event culminates in the selection of one cat to ascend to the Heaviside Layer, where they will be reborn into a new life. This moment is filled with hope and renewal for the Jellicle cats.