Natalie Sue Miller (March 7, 1934 – May 29, 2017) was an American fashion model, breast cancer survivor, breast cancer activist, counselor, and author. Born in Kansas City, Missouri, she moved to Denver, Colorado at age 19 as a newlywed and started a career in fashion modeling. After being diagnosed with breast cancer at the age of 34 and undergoing a mastectomy, she created a fashion show featuring models who had also had breast cancer. In 1981, she founded the Sue Miller Day of Caring, a non-profit organization for breast cancer education and awareness. In its first 35 years, the Day of Caring has been a resource for over 17,500 survivors of breast cancer, providing educational forums and support services at its annual event, held in nine U.S. cities. Miller earned her bachelor's and master's degrees at age 60 and 75, respectively, and wrote her autobiography, I'm Tougher Than I Look, in 2004. In 2002, Miller was inducted into the Colorado Women's Hall of Fame.