Originally from Greeneville, Tennessee, Parker Overall toured East Tennessee with a children's theater group before heading to New York and a career on the professional stage. Numerous off-off-Broadway productions of such plays as "The Seagull" and "The Skin of Our Teeth" preceded her performance as Becky Lou in the Hartford Stage Company's production of Sam Shepard's "The Tooth of Crime." Overall made her Broadway debut as Rowena, the prostitute, in Neil Simon's "Biloxi Blues" and reprised the role in the motion picture version. Other film credits include "Vibes" with Jeff Goldblum and Cyndi Lauper, "Talk Radio," directed by Oliver Stone, "Mississippi Burning" with Gene Hackman and Willem Dafoe and "Kindergarten Cop" with Arnold Schwarzenegger. On television, Overall starred in the Witt-Thomas-Harris pilot "The Line" and has appeared in several productions for The Nashville Network. Parker Overall was named Best Supporting Actress in a Quality Comedy by the members of Viewers for Quality Television (VQT), for her work on the sitcom's "Empty Nest."
A self-described liberal and environmental activist, she has been openly vocal and critical of the Bush Administration and has participated at various rallys during 2003 regarding nucelar power plants and the Middle East war. She loves the movie The Long Riders, so much, she once vowed to meet all the brothers who starred in the film. Is diabetic.