Patricia T. Arquette is an American actress and director who is the older sister of David Arquette and is best known for her role as Allison DuBois on the NBC/CBS drama series Medium from 2005 to 2011. For Disney, she played Kathryn Barlow in the 2003 Disney adventure comedy-drama film, Holes. She also played Kathy O'Hara in the 1994 Touchstone Pictures film, Ed Wood and Havana in the Hollywood Pictures film Holy Matrimony.