(UPI) -- Though Heidi Montag's relationship with Lauren Conrad soured during MTV's The Hills series, she's still keeping in touch with some of her former reality TV castmates -- Jen Bunney, an alum of both The Hills and Laguna Beach, tweeted a photo of herself hanging out with Montag just last week.
On Wednesday, the 27-year-old tweeted congratulations to another Hills star, Kristen Cavallari, who recently announced that she was pregnant with her second child.