Paris Hilton and her former Simple Life costar Nicole Richie reunited in Miami on Dec. 6 -- see the picture! Credit: Courtesy Paris Hilton

Now that's hot! Former Simple Life costars and BFFs Paris Hilton and Nicole Richie came together in Miami this weekend during the city's world-famous Art Basel international art show. Hilton, 32, reposted a picture of the reunion via Instagram on Friday, Dec. 6.

"Miami Nights with @DerekBlasberg & @NicoleRichie. #OldFriends #GoodTimes," she captioned the shot, which she credited to fashion writer Blasberg. The photo shows the blonde socialite wearing a fuschia leopard-print frock and flashing her signature smirk at the camera. Richie, 32, stands on the other side of Blasberg, in a polka-dot top and black skirt.

This is the first time in a long time that the pals have been photographed together. The two famously had a falling-out in 2005, with Hilton telling USA Today that she and her then-costar were "no longer friends."

"Nicole knows what she did, and that's all I'm ever going to say about it," she said in a statement at the time. Not long after, however, the two patched things up and resumed both their friendship and filming of their show.

The "Stars Are Blind" singer recently reminisced with Us Weekly about her days on The Simple Life with fellow Hollywood kid Richie, recalling how they had their cellphones taken away from them on the show. "We had to fend for ourselves," she explained.

These days, Richie is fending for more than just herself. Married to Joel Madden since 2010, the fashion designer now has two kids with the rocker, daughter Harlow, 5, and son Sparrow, 4. And though Hilton wasn't invited to the couple's wedding, she told Wendy Williams in May that they still keep in touch.

"We've been best friends since we were 2 years old," she said. "I actually just got an email from her backstage." 

One former BFF with whom she's less chummy? Lindsay Lohan. On Friday, Dec. 6, the socialite's brother Barron Hilton was involved in an altercation with a man named Ray LeMoine, whom Barron claims was ordered by Lohan to attack him. (The Mean Girls actress has denied she was even at the party at the time of the alleged attack.)