Hubley was born Susan Season Hubley in New York City, the daughter of Julia Kaul (née Paine) and Grant Shelby Hubley, a writer and entrepreneur. Her brother is actor Whip Hubley. She also has a sister, Sally Hubley. From 1991 to 1994, she portrayed Angelique Marick on the daytime drama All My Children. She appeared in Stepfather III and Child in the Night, both in 1990. Hubley was married to Kurt Russell from 1979 to 1983. They have a son, Boston Oliver Grant Russell (born 1980).