Got her first acting job at age 9 in a commercial for a dollhouse. She gave up regular schooling at age 13 to focus on acting. Her parents, Bob and Rosemary, gave her home instruction. Her parents are retired physical education teachers. Between the ages of 9 and 13 Kristy appeared in over 30 television commercials. Appears nude in the November 2002 issue of Playboy. Was the original "Buffy the Vampire Slayer" before Sarah Michelle Gellar. Both ladies have something else in common: each is an only child. Has co-starred with Charlie Sheen in 3 films: Ferris Bueller's Day Off (1986), Hot Shots! (1991), and The Chase (1994).