Here’s the crazy thing, it doesn’t feel like it was that long ago that we were watching Lauren Conrad, Heidi Montag, Kristin Cavallari, and the rest of The Hills cast on our TV screens. But in reality, the first season aired over 10 years ago, and the series ended almost seven years ago.

So what have the Hills girls been up to since the first episode premiere in May 2006? Well, pretty much all of them are moms now.

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Heidi Montag just announced her pregnancy in April, but Kristen Cavallari was the one who kicked off the trend back in August 2012 when she had her first son. She welcomed her second son in May 2014 and a daughter in November 2015 — and they’re all seriously adorable.

Now, she’s giving mom advice to the other girls as they welcome children of their own.

“Pretty much everyone from The Hills is either pregnant or has had a baby,” Kristin told Entertainment Tonight. “It’s really cool to see everyone in the next chapter of their life.”

Kristin also helped Heidi prepare for parenthood. “I sent her a whole list of things I loved as a mom [during] the first six months, because I remember being a first-time mom, I [didn’t] really have anyone I could turn to.”

The only thing she wouldn’t help with? Baby names! “I was like, ‘Heidi, this is your baby. …It’s what you want to name your baby.’”

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The only two girls who don’t have little ones are Stephanie Pratt and Lo Bosworth, and, TBH, it seems like Stephanie’s already playing mommy to her adorable little puppy!

When we realized just how many of the girls are or are going to be moms sometime this year, we pretty much freaked. If the Hills ladies are growing up, that means it’s probably about time that we do, too.

Check out the gallery below to see the cast of The Hills with their baby bumps and babies.