Heidi Montag has nothing but love for her former Hills costar Kristin Cavallari!

As Cavallari, 25, prepares to welcome her first child -- a baby boy -- with on-again fiance, NFL player Jay Cutler, Montag couldn't help but gush to Us Weekly about how pregnancy suits her pal.

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"She is the most beautiful pregnant woman I've ever seen and I'm very proud of her," Montag, 25, told Us Friday during a Pure nightclub appearance at Caesar's Palace Hotel and Casino in Las Vegas. "I think she's gonna be the best mother ever."

As her friend prepares for first-time motherhood, Montag -- married to Spencer Pratt since 2009 -- admits that having a baby isn't in the cards for her just yet. "Kristin's in a perfect place in her life and in my life, I'm not ready," Montag reasoned.

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In the meantime, however, Montag -- who famously underwent 10 plastic surgeries in one day back in 2009 -- tells Us she's enjoying her reunion with her own mother, Darlene Egelhoff, from whom she was estranged until just recently.

VIDEO: Post-surgery Heidi Montag struggles to eat a burger

"I've been talking to her for about a year and we've both just been so busy and we had so much going on and I finally just had the chance to catch up with her," Montag said of coming together with Egelhoff after two years June 2 for drinks and massages.

"I'm all about forgiveness," the former MTV reality star turned singer said. "Family's very important and I think life is just too short."

This article originally appeared on Usmagazine.com: Heidi Montag: Kristin Cavallari Will Be the "Best Mother Ever"