Marvin Israel was an American artist and photographer that worked in New York. He worked with Diane closely helping her further develop her career as a photographer. Though both Diane and Marvin were married outside of their relationship, they started dating in late 1959. This relationship would continue until she passed, throughout her marriage and her divorce. While Diane’s husband, Allan Arbus, was very supportive of Diane’s career, Marvin pushed Diane to become an independent photographer and work on her portfolio, not for commercial photography. This relationship with Marvin was very beneficial to Diane’s career as he influenced and pushed Diane to take on a creative aspect of photography, which led her to take part in focusing on photographing the outskirts of society. Even more so, Marvin convinced Diane to put out her first portfolio, a box of ten photographs featuring drag queens, identical twins, dwarfs, and many more. These images guided her to be connected with other famous photographers of New York and even get her first portfolio published in the Smithsonian American Art Museum. Working alongside Marvin Israel and being involved with him romantically impacted the direction of Diane’s career immensely, from a simple commercial photographer to an established innovative photographer before she took her own life in 1971.