Big Boy is an American casual dining restaurant chain headquartered in Southfield, Michigan; it is currently operated in most of the United States by Big Boy Restaurant Group, LLC. The Big Boy name, design aesthetic, and menu were previously licensed to a number of named regional franchisees. The parent franchisor company has changed over the system's lifetime: it was Bob's Big Boy from 1936 to 1967, then Marriott Corporation until 1987, then Elias Brothers' Big Boy until 2000. Since 2001, control of the trademark in the United States has been split into two territories, between Big Boy Restaurants in most of the country, and Frisch's Big Boy as an independent entity in a few states in the Midwest.