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Paris Hilton celebrated her longtime friend Kim Kardashian’s 45th birthday with a nostalgic Instagram tribute on Wednesday, October 22, and it’s giving early-2000s glam all over again.

The media mogul, 44, shared a carousel of throwback and recent photos capturing their decades-long friendship. In one snap, the duo pose for a modern selfie, both sporting their signature flawless glam, Hilton with her glossy blonde waves and nude-toned makeup, Kardashian with sleek brunette locks and her signature contoured glow.

Other pics throw it back to their mid-2000s heyday, including sun-soaked shots by the beach, twinning in designer fits and oversized shades, and a candid moment of the two screaming on a rollercoaster, gold skirts, matching smiles and all.

Hilton, who became a household name in the early 2000s thanks to The Simple Life, has since built a global brand as a DJ, entrepreneur and advocate.

Kardashian — once Hilton’s then-assistant and best friend — went on to build her own empire, and Hilton’s post made sure to spotlight that evolution. “I’m so proud of the woman, mother, entrepreneur and icon you’ve become,” she wrote in her caption, calling Kardashian “always evolving, always inspiring.”

The nostalgic post had fans flooding the comments with love: