Harry Morris Warner was an American studio executive, one of the founders of Warner Bros., and a major contributor to the development of the film industry. Along with his three younger brothers, Warner played a crucial role in the film business and establishing Warner Bros., serving as the company president until 1956.

Warner Bros. Entertainment Inc. is an American film and entertainment studio headquartered at the Warner Bros. Studios complex in Burbank, California, and a subsidiary of Warner Bros. Discovery (WBD). Founded in 1923 by four brothers, Harry, Albert, Sam, and Jack Warner, the company established itself as a leader in the American film industry before diversifying into animation, television, and video games, and is one of the "Big Five" major American film studios, as well as a member of the Motion Picture Association (MPA).