Thorne's first movie appearance was as a sidelines fan in the 2003 movie "Stuck on You", but she was not credited for it. Since then, she has appeared in movie and television projects including "Jimmy Kimmel Live!", "Entourage", "The O.C." (as a younger version of Taylor Townsend), the third-to-last episode of "October Road", and five episodes of "Dirty Sexy Money" (as Margaux Darling). In 2007, Thorne appeared as a young girl who saw visions in "The Seer".