It’s the early 2000s all over again — or at least that’s how it feels seeing Kourtney Kardashian and Nicole Richie hang out together and pose for Instagram photos at ALIST Founder Ashlee Margolis' 40th Birthday celebration!

We thought these days were behind us, especially since Kourt’s former [alleged] fling Justin Bieber is now rumored to be dating Nicole’s little sister, Sofia Richie.

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Kickin' it old school.

A post shared by Kourtney Kardashian (@kourtneykardash) on

“Kickin' it old school,” the 37-year-old says.

Back in December, Kourtney was spotted leaving Justin’s hotel room at 4 a.m. after a night out and instantly fueled dating rumors. Biebs was first linked to Sofia earlier this month after hanging out on multiple occasions.

justin bieber and sofia richie

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We guess there are no hard feelings!