She retired from the movies in 1962, following her marriage to her third husband, Hollywood playboy Fernando Lamas.
In her later years she hosted swimming events for ABC-TV's coverage of the 1984 Olympic Games and turned her attention to business, launching her own line of swimwear.
Williams was married to Mr Lamas for 20 years until his death in 1982. She and her last husband Edward Bell lived in Los Angeles' Beverly Hills.
Her autobiography also told of many romances, including one with actor Jeff Chandler.
According to Williams, she discovered he was a cross-dresser and walked out, explaining: "Jeff, you're too big for polka dots." Several of Mr Chandler's colleagues denied Williams' claims when the book was published.