While Dian was in an African safari, she met Alexie Forrester. They had romantic love affairs for several years. They also got engaged for several years. She also dated Bob Campbell and they also wished to get married but it never happened. In 1970, while she was in Cambridge she became pregnant with her first child but she has an abortion. Her nationality is American and she is of white ethnicity.
Dian was aged six years old, when her parents dissolved their married life. Then she began living with her mother. She was enrolled at Lowell High School and she also earned her high school graduation from there. She then joined College of Marin with a major in business but after she rekindled her love of animals, she got enrolled at University of California, Davis with a major in biology and a minor in pre-veterinary course. After her step father didn't provide her financial support, she began working at White Front as a clerk. She also did laboratory work, and laboring as a machinist in a factory. In the early 1950s, she for transferred to San Jose State College and she finally earned her bachelor’s degree from there in 1954. In 1955, she began working in occupational therapy. In 1956, she began working at Kosair Crippled Children's Hospital as an occupational therapist. She was aged six years old when she began riding horse. Though, she denied an initial offer to join the Henrys on an African tour because of her humble financial background, she finally did her seven-week visit to Africa in 1963. While she was in Africa, she published several journals in The Courier-Journal. At the end of 1967, she founded the Karisoke Research Center. At the end of 1985, she was found murdered in the bedroom of her cabin in Virunga Mountains, Rwanda. The actual facts about her death and murderer are unknown yet. Her net worth was also unknown.