The Hills Kristin Cavallari reunites with pregnant Heidi Montag 08/31/2017 Kristin Cavallari reunited with pregnant former co-star Heidi Montag this week. 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: Kristin Cavallari Lauren Conrad Audrina Patridge Heidi Montag Whitney Port Jay Cutler
