From Wikipedia, the free encyclopedia. Julia Campbell (born March 12, 1962) is an American actress, who is best known for her role as the "mean girl," Christie Masters-Christensen, in the feature film Romy and Michele's High School Reunion. She has a starring role in the feature film, Tillamook Treasure (2006), in which she plays Kathryn Kimbell, the mother of the story's lead character. She has had recurring roles on Still Standing, Martial Law, and Herman's Head, and guest starring roles on ...