Kathleen Robertson, born July 8, 1973 in Hamilton, Ontario, Canada, is an actor. She stars as Kitty O'Neill, a political strategist, in the first and second seasons. She has also appeared in the films Torso: The Evelyn Dick Story (2002) and Hollywoodland (2006). She starred as Tina Edison in the series Maniac Mansion from 1990 to 1993 and then starred as Clare Arnold in Beverley Hills, 90210 from 1994 to 1997.
Robertson started taking acting classes when she was ten, and had roles in local theater productions. Her first television guest appearances were in My Secret Identity and E.N.G.. She then appeared in Maniac Mansion from 1990–1993, playing Tina Edison, the eldest of three children of Dr. Fred Edison (Joe Flaherty). She did not debut on the big screen until her small role in the Brenton Spencer film Blown Away. She was cast as Clare Arnold in Beverly Hills, 90210, and played the role from 1994 to 1997. Her ex-boyfriend, director Gregg Araki, cast her in the lead of two of his films, Nowhere (1997) and Splendor (1999).