Lili Rosson est née le 18 novembre 1931 en Californie, États-Unis. Elle était actrice. Elle est connue pour The Diary of a High School Bride (1959). Elle est morte le 27 juin 2019 en Californie, États-Unis.
Her father-in-law was Harold Rosson, a five-time Oscar-nominated cinematographer known for his work on The Wizard of Oz (1939) and Singin' in the Rain (1952), and her husband was Edward Rosson, the cinematographer on White Lightning (1973) and Love at First Bite (1979).