One of Heidi Montag's co-stars from The Hills revealed if they still keep in contact.

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In an interview with Entertainment Tonight from last Thursday, reality star Kristin Cavallari said that she and Montag are very much still in touch and they seem to be on great terms.

"I talk to Heidi all the time, yeah," Cavallari said. "It seems like she's doing really well and [she and husband Spencer Pratt] are really happy."

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Montag's friend added that she's glad the reality star couple managed to keep their marriage going even after the series ended.

"I love that they're still married," Cavallari said. "And they've sort of shut up all the haters, you know?"

While these two girls appear to be doing splendidly in their friendship, another relationship on the former series turned to the worst. Montag and Lauren Conrad were best friends on the series, but they had a massive fallout and don't speak anymore. In fact, Montag recently spoke to Us Weekly about what she apparently had to put up with when she and Conrad were working together.

"I spent years pretending to like her for a living," Montag said via Yahoo! Celebrity. "It was literally my job to deal with her, and it wasn't pleasant...I had nothing to do with her problems. I even tried to help her. The fact is, she lied about me and tried to destroy my life, yet I was the one painted as the villain so the show could have her as the good guy."

Tags: Heidi Montag Kristin Cavallari