Kristin Elizabeth Cavallari (born January 5, 1987) is an American television personality celebutante and actress. She is widely known for her starring roles on the former MTV programs Laguna Beach: The Real Orange County and its spin-off, The Hills.
Cavallari was born in Denver, Colorado, the second of three children of Judith Spies (née Eifrig) and Dennis Cavallari. When her mother divorced her father, her older brother Mike and sister Peighton moved with their father to Laguna Beach, California, while she moved with her mother to the village of Barrington, Illinois, a suburb an hour northwest of Chicago. After difficulties adjusting to a new life with a stepfather and stepbrother, Kristin moved to California to live with her father and brother and sister instead. Kristin was enrolled at Santa Margarita Catholic High School for her freshman year. After she attended a Driver's Education course through Laguna Beach High School, her father enrolled her in LBHS.
Cavallari was in her junior year of high school when the first season of Laguna Beach: The Real Orange County began production. At the time, she was involved in an on-and-off relationship with senior Stephen Colletti.