Diane Vachon (January 23, 1951 – August 24, 1991) was a Canadian professional wrestler, best known by her ring name Vivian Vachon. A member of the Vachon family of wrestlers, she was the sister of Maurice and Paul Vachon, and the aunt of Luna Vachon. She is considered one of the best female wrestlers of the 1970s.
At the suggestion of her brother Maurice, she began to train as a professional wrestler, and went to South Carolina to train under The Fabulous Moolah. It was also Maurice who suggested she adopt the ring name Vivian Vachon (sometimes spelled Viviane Vachon).
In February 1971, she became the California Women's Champion. She became the American Wrestling Association's (AWA) Women's Champion for a time, defeating Kay Noble on November 4, 1971. In the early 1970s she starred in the movie Wrestling Queen, which also included her brothers and other wrestlers. She wrestled in the early 1980s on a tour of Japan, and in 1986 for her brother Maurice's retirement tour. In 2006, she was honored posthumously by the Cauliflower Alley Club.