Ashley Gardner (born April 11, 1964) is an American stage actress. A graduate of the North Carolina School of the Arts, she has an extensive resume in live theatre, as well as supporting parts in various movies and television programs. She appeared in the sitcom Seinfeld episode "The Library" as Marion. Her longest span for a role is the voice of Nancy Gribble in the animated series King of the Hill. In addition to playing the role of Nancy, for two episodes in Season 11, she temporarily took over the voice of Bobby Hill.