Disney's Hollywood Studios is a theme park at the Walt Disney World Resort. Spanning 135 acres (546,000 m²) in size, its theme is show business, drawing inspiration from the heyday of Hollywood in the 1930s and 1940s. The third park built at the resort, it opened on May 1, 1989 as Disney-MGM Studios. In 2010, the park hosted approximately 9.6 million guests, ranking it the fifth-most visited amusement park in the United States, and eighth-most visited in the world.