Warner made no pretense of faithfulness to his wife, Ann, and kept a series of mistresses throughout the 1950s and 1960s. The most enduring of these "girlfriends" was an aspiring actress named Jackie Park, who bore a "startling" resemblance to Warner's second wife. The relationship was in its fourth year when Ann Warner pressed her husband to terminate the affair. Although Ann did once have an affair with studio actor Eddie Albert in 1941, she was much more devoted to the marriage by contrast. In the 1960s, she insisted that, despite his reputation for ruthlessness, Jack Warner had a softer side. In a note to author Dean Jennings, who assisted Warner on his 1964 autobiography, "My First Hundred Years in Hollywood", Ann Warner wrote: "He is extremely sensitive, but there are few who know that because he covers it with a cloak."