The pair have been friends for years, and when the two went on a trip to Palm Springs, Calif. — where Kris Jenner has a home — over the weekend, they sparked romance rumors.
"They're in Palm Springs together. They've been dating for about a month or two," a source revealed. "They've been friends for a long time but it's turned romantic. Travis has liked her for a while."
"Kourtney and Travis are officially a couple," another source told Us Weekly. "Travis is very smitten with Kourtney and has been for a while."
"Kourtney and Travis have had a platonic relationship for years and they’ve been friends and family friends for a very long time, but recently something sparked and their relationship has turned romantic," an insider spilled to Entertainment Tonight.
"They live on the same block and things are super easy between them because they know each other so well and just click and get one another. Her kids and his kids get along so well too, which is a major plus for both of them."
Kardashian, 41, and Barker, 45, both live in the same gated Calabasas community in California, and their friendship dates back to before Keeping up With the Kardashians aired.
"How could you not stare at Kim?" the Meet The Barkers alum previously told Us Weekly. "Mind you, I enjoyed hanging out with Paris, but I love curvy girls. Kim was eye candy. I was no way disrespectful to Paris, but I couldn’t keep my eyes off Kim!"
Although he "had a crush on her" and they "were flirtatious," Barker and Kim remained pals. The musician even appeared on KUWTK and spin-offs, such as Kocktails With Khloé, over the years.
Kim even approached Barker for advice when Ryan Seacrest initially approached the family about KUWTK.
"I gave her the best advice I could. I think my family is interesting and it could be something," Barker recalled Kim saying, adding that she was "absolutely right!"
Kourtney and Barker previously sparked romance rumors when they were spotted getting dinner together in Malibu in February 2019. In September 2018, they were also seen leaving a vegan restaurant in Los Angeles.
However, Barker denied anything was going on with the Poosh founder at the time. "Kourtney's like a dear friend. That's it," Barker said in 2019. "I mean, I love her to death. I love her family to death. But yeah, just friends."
Barker shares stepdaughter Atiana, 21, daughter Alabama, 15, and son, Landon 17, with his ex-wife, Shanna Moakler. The pair were married from 2004 until 2008.
PEOPLE reported the news about Barker and Kardashian's relationship status.