Heidi Montag may have taken a bit of a different path from her “Hills” co-stars after the show ended, but that doesn’t mean she isn’t following their major milestones. The former reality show star tweeted to old pal Kristin Cavallari earlier this week after Cavallari revealed on the micro-blogging site that she and husband Jay Cutler are expecting their second child.

Montag, who is married to fellow “Hills” alum Spencer Pratt, doesn’t have any children of her own but seemed genuinely excited for the couple’s news.

(image)

She slipped, however, as Cavallari and Cutler say they don’t know the sex of the baby yet.

Lol…@heidimontag jumped the gun…we don't know the sex 😉

— Kristin Cavallari (@KristinCav) October 30, 2013

Cavallari did say that she would love to have a girl to even out the household.

“We want to have a second sooner rather than later,” she said. “We know we want another one close in age to Camden and we’re at the point where we’re both ready…obviously, I want a little girl, but if I had another boy I would be so excited as well. I love having a boy. Either way, I’d be really, really happy.”

Montag and her husband are well-known for their belief in the healing powers of crystals and new-age faith, and she announced recently that they are working on an “aura baby”, which she describes as “a product of the soul born out of the bio-chemistry of the universe.”

“Ur Aura comes from the excess love from the universe given to you by others. They give their Aura to u,” she tweeted on Wednesday. “An Aura baby is how u regift that excess Aura. Its birth is a manifestation.”