Kristin Cavallari from 'The Hills'
Photos of MTV reality TV star Kristin Cavallari, who joins "The Hills" this season.
A pregnant Kristin Cavallari poses at the Conde Nast Traveler Hot List Party at The Presidential Suite of Hotel Bel-Air in Los Angeles. (April 12, 2012)
Kristin Cavallari backstage at the Betsey Johnson Spring 2011 fashion show during Mercedes-Benz Fashion Week at The Theater at Lincoln Center. (Sept. 13, 2010)
Kristin Cavallari backstage at the Badgley Mischka Spring 2011 fashion show during Mercedes-Benz Fashion Week at The Theater at Lincoln Center. (Sept. 14, 2010)
Mark Ballas with Kristin Cavallari. (Sept. 26, 2011)
Kristin Cavallari from "Laguna Beach" joins the cast of "The Hills" and immediately tangles with Audrina.
With Lauren Conrad gone, Kristin Cavallari "Laguna Beach" joins the cast of "The Hills" and immediately tangles with Audrina.
Kristin Cavallari attends Dolce & Gabbana's celebration for Fashion's Night Out at the Dolce & Gabbana Boutique on Sept. 10, 2009 in New York City.
Reality TV stars Lauren 'Lo' Bosworth, left, and Kristin Cavallari attend MTV's "The After Show" taping held at the Masonic Temple on September 11, 2009 in Toronto
Reality TV star Kristin Cavallari attends MTV's "The After Show" taping held at the Masonic Temple on Sept. 11, 2009 in Toronto.
Kristin Cavallari arrives at the MTV Video Music Awards on Sunday Sept. 13, 2009 in New York.
Kristin Cavallari co-starred on MTV's "Laguna Beach," where she came off as bratty, stuck up, mean and arrogant. We loved her.
Actress Kristin Cavallari arrives at the 8th Annual Teen Choice Awards at the Gibson Amphitheatre on August 20, 2006 in Universal City, California.