Jack Box is the fictional corporate mascot and executive chairman of the Jack in the Box fast-food chain, characterized by his distinct round white ping-pong-ball head, blue suit, and yellow conical clown hat. Created by advertising agency TBWAChiatDay in the late 1990s, Jack was introduced in a famous commercial campaign where he metaphorically blew up old-style traditional restaurants to symbolize a modern corporate rebirth, serving ever since as the witty, recognizable face of the brand.