Kristin Cavallari Reunites with The Hills Costar Heidi Pratt and Marvels At Her ‘Cute Little Belly’

Pretty in pink! Kristin Cavallari reunited with her former costar Heidi Montag on Wednesday, taking to Instagram to commemorate the occasion with a cute caption, “This girl. Love her and that cute little belly. Thanks for coming by @heidipratt ” Montag is eight months pregnant with her first child with husband Spencer Pratt, whom she met while filming the MTV reality show.