Sigrid Thornton first set foot on the Australian stage at age 9; four years later she made her first TV appearance. At 18, she made her big-screen bow as Maria in The Getting of Wisdom (1977). Audiences outside Australia are most familiar with Thornton for her portrayal of Jessica in 1982's The Man From Snowy River and its 1988 sequel Return to Snowy River. She also starred in the Australian mini-series All the Rivers Run (1984), which received American airplay on the HBO Cable Service. Additional Sigrid Thornton projects include the 1988 American TV series Paradise, the British TV weekly Guns of Promise, and 1990's Great Expectations: The Untold Story, for which she did double duty as star and associate producer.