Leigh is the daughter of an Air Force Colonel, and she spent most of her "formative" years overseas: her family moved from Turkey, to the Philippines, to Germany, to Greece, and back to Germany, all before she was 18. She received a B.A. from Princeton University, where she studied Theater and Art History. Leigh has appeared in numerous theatrical productions in New Jersey and Los Angeles, including 3 original sketch comedy shows with the troupe she helped found in 1999, Wrenches & Wenches. In addition to her theatrical and television work, Leigh starred in the independent film, "re: stinky boss", directed by Christopher Leone, in 2001.