. The Nestor Company, the first motion picture studio in Hollywood, was opened in 1911 by David Horsley and Al Christie. This marked the beginning of Hollywood's dominance in the film industry. The Golden Age of Hollywood: The 1920s saw the establishment of major film studios in Hollywood, including Paramount Pictures, Warner Bros., Universal Pictures, and Columbia Pictures. These studios developed a system known as the studio system, which controlled every aspect of the filmmaking process. During the 1930s and 1940s, Hollywood experienced its Golden Age. It became synonymous with glamour and produced iconic films and stars, such as "Gone with the Wind," "Casablanca," Marilyn Monroe, Humphrey Bogart, and Clark Gable.