The Hills Ex-'Laguna Beach' star Kristin Cavallari confirms joining 'The Hills' 05/14/2009 Former Laguna Beach star Kristin Cavallari has confirmed recent reports that she'll be joining The Hills as a replacement for departing cast member Lauren Conrad. Read More RELATED NEWS Kristin Cavallari debuts new 24-year-old boyfriend Mark EstesBrody Jenner and Tia Blanco welcome their first child'The Hills' alum Brody Jenner engaged to pregnant girlfriend Tiarah "Tia" Blanco TAGS: Get This Party Started Laguna Beach Kristin Cavallari Lauren Conrad Brody Jenner Audrina Patridge Heidi Montag Stephen Colletti
