Louis B. Mayer was a prominent film producer and co-founder of Metro-Goldwyn-Mayer (MGM), one of the most successful movie studios in Hollywood during the early to mid-20th century. Born on July 4, 1885, in Saint John, New Brunswick, Canada, he moved to the United States and began his career in the entertainment industry by managing theaters. Mayer played a crucial role in shaping the studio system and was known for his ability to discover and promote talent. Under his leadership, MGM produced numerous classic films and became synonymous with high-quality productions, making a significant impact on the film industry. He passed away on October 29, 1957.