Their tumultuous romance began in the wake of their twin splits from their husbands.
Now Miley cyrus and Kaitlynn Carter have reportedly ended their relationship of barely over a month, according to People.
The 26-year-old singer and the 31-year-old former wife of Brody Jenner are apparently staying close, even if their connection is no longer romantic.
'Miley and Kaitlyn broke up,' said a source with knowledge of the former couple. 'They’re still friends.'
'They’ve been friends forever and were there for each other when they were both getting separated,' they continued, adding: 'But they’re just not in a romantic relationship anymore.'
The sudden split came as a surprise to followers of the couple, as Miley and Kaitlynn were seen out together in Los Angeles only a week ago on September 14.
The couple had reportedly been living together in LA following their breakups.
'They live together and are very happy. Miley is doing great. She is moving on. She seems to have no regrets. She loves being with Kaitlynn,' a source told People at the time.
Kaitlynn initially shared vacation photos of herself aboard a yacht with Miley on August 9, only two days before the Wrecking Ball singer announced that she had separated from her husband Liam Hemsworth, 29, whom she'd been married to since December of last year.
It was reported that Kaitlynn had broken up with Brody on August 2, though Page Six reported that their elaborate Balinese wedding hadn't been a legally binding ceremony.
On August 11, photos were released of the two women cuddling and kissing aboard a boat, confirming the two had sparked up their own relationship.
Though the new pairing may have been a surprise, the connection between Miley and Kaitlynn wasn't anything new.
The two had been friends for years, and they spent plenty of time together when they were married to Liam and Brody.
Their tryst reportedly took Liam by surprise. He filed for divorce from the Party In The USA singer after seeing the photos of her and Kaitlynn kissing aboard the boat.
Despite her newest relationship coming to a sudden end, Miley didn't seem especially broken up about it online.
The Black Mirror actress shared some playful photos of herself taking a trip to Las Vegas with her mother Tish Cyrus and sister Brandi Cyrus.
Miley kept her look fairly reserved, opting for a pair of tight dark blue jeans and knee high beige boots with a white top and brown jacket.
'Viva Las Vegas,' she captioned own photo while posting about catching a Def Leppard concert over another similar pose.
Kaitlynn was seen out on her own on Friday night at Entertainment Weekly and L'Oreal Paris' 2019 Pre-Emmy Party.
Miley has stayed away from the public eye in recent days, though she shared a fierce photo of herself solo that showcased her trim arms and a bit of underboob.
So far, neither Miley nor Kaitlynn have publicly commented on the alleged split.
© Associated Newspapers Ltd.