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Jack Leonard "J. L." Warner (August 2, 1892 – September 9, 1978), born Jacob Warner in London, Ontario, was a Canadian American film executive who was the president and driving force behind the Warner Bros. Studios in Hollywood, Los Angeles, California. Warner's 45-year career was longer than that of any other traditional Hollywood studio tycoon. As co-head of production at Warner Bros. Studios, he worked with his brother, Sam Warner, to procure the technology for the film industry's first talking picture. After Sam's death, Jack clashed with his surviving older brothers, Harry and... MORE

Jack Leonard "J. L." Warner (August 2, 1892 – September 9, 1978), born Jacob Warner in London, Ontario, was a Canadian American film executive who was the president and driving force behind the Warner Bros. Studios in Hollywood, Los Angeles, California. Warner's 45-year career was longer than that of any other traditional Hollywood studio tycoon. As co-head of production at Warner Bros. Studios, he worked with his brother, Sam Warner, to procure the technology for the film industry's first talking picture. After Sam's death, Jack clashed with his surviving older brothers, Harry and Albert Warner. He assumed exclusive control of the film production company in the 1950s, when he secretly purchased his brothers' shares in the business after convincing them to participate in a joint sale of stocks. Although Warner was feared by many of his employees and inspired ridicule with his uneven attempts at humor, he earned respect for his shrewd instincts and toughmindedness. He recruited many of Warner Bros.'s top stars and promoted the hard-edged social dramas for which the studio became known. Given to decisiveness, Warner once commented, "If I'm right fifty-one percent of the time, I'm LESS