Now that's hot.
Kim Kardashian served up early '00s vibes with her adorable birthday tribute to longtime pal Paris Hilton. The Keeping Up With the Kardashians alum took to Instagram on Feb. 17 to shout out the Paris in Love star, who is turning 41.
"Happy birthday @parishilton xo," Kim wrote in her Stories along with two photos from their 2020 SKIMs Velour Collection photo shoot. The images show the duo modeling modern versions of their classic 2000s velour tracksuits, which were part of Kim's clothing line a few years back.
Kim and Paris completed their looks with retro oversized sunglasses, giant metallic Louis Vuitton purses and even an old school Sidekick phone.
"Loves it @KimKardashian," Paris replied via IG.
Even decades later, these fashionable friends prove their bond is for life.
Kim also shared several precious pics from a past Kardashian family Christmas party, which show her and Paris laughing, hugging and playing in the snow together.
Meanwhile, Paris is enjoying warmer climes—sharing videos of herself and husband of three months Carter Reum aboard a mega-yacht decorated with balloons.
Only the best for this birthday girl.
Relive Paris and Kim's friendship over the years by scrolling through the photo gallery below!
Don't miss a new Paris in Love Tuesdays at 10 p.m. on E!.
The ladies posed together at the 2006 season premiere of Entourage.
The stars hit the dance floor at a launch event for the T-Mobile Sidekick 3 back in June 2006.
In June 2006, the stars stepped out at a Dom Pérignon event, dressed to impress in cocktail dresses.
The famous friends stepped out together at a Prada event in July 2006.
In celebration of Hilton's debut studio album, Paris, her famous friend showed up to support in August 2006.
The ladies shared a smile at an Us Weekly event in September 2006.
The stars changed up their wardrobes while in Munich during Oktoberfest in September 2006.
Rocking matching looks, Paris and Kim hung out together in Sydney.
Some friends wear friendship bracelets, but Kim and Paris carried coordinating Louis Vuitton bags.
The stars rang in New Year's Day together in Sydney, Australia.
The two were spotted out and about in Los Angeles in January 2007.
The stars celebrated Christmas together in 2016 at the holiday soirée hosted by the Kardashians.
Paris was among the star-studded guests at the Kardashian-Jenner Christmas party once again in 2018, held at Kim's house that year.
The reality star helped Hilton celebrate her 38th birthday at a belated party in March 2019.
The friends snapped a selfie at Kim's baby shower for her second son in 2019.