Kourtney Kardashian, Justin Bieber: How Their Hot Hookups Began!

Never say never! It’s not the most likely of pairings, but as was previously revealed by Us Weekly, Kourtney Kardashian and Justin Bieber have been hooking up for months.

The pals-turned-flames have gotten particularly comfortable in recent months after Kardashian, 36, split from her longtime love Scott Disick in July.

“Justin started hanging out with Kourtney alone because she started going out more,“ a source tells Us in the exclusive new cover story. “Remember, she never really went out before, so he’s been showing her a good time.”

Kourtney Kardashian and Justin Bieber in Los Angeles on October 9, 2015
Kourtney Kardashian and Justin Bieber at The Nice Guy in Los Angeles on October 9, 2015 ROLO/AKM-GSI

The fun began when the reality star and pop singer, 21, first hooked up in “late August, early September,” according to another insider.

Their first public outing together — which seemed innocent at the time — was at Hollywood lounge the Nice Guy in October for dinner, followed by a trip to Universal Studios’ Halloween Horror Nights.

The “Sorry” crooner first became friends with the family in 2010 when he posed with Kourtney’s famous younger sister Kim Kardashian for a Mrs. Robinson–inspired Elle shoot. Since then, he has been out partying with Kendall and Kylie Jenner and has turned to Kim’s hubby, Kanye West, for career advice. Plus, Bieber’s former tour manager Corey Gamble is now dating Kourtney’s mom, Kris Jenner. Double date soon?

Bieber also loves spending time with Kourtney’s tots — Mason, 6, Penelope, 3, and Reign, 12 months.

“He actually goes over a lot to see her kids, and they love him,” the source says of Bieber.

For more information on their hot hookups, watch the video and pick up the new issue of Us Weekly, on stands now! 

Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics and more delivered straight to your inbox!

Want stories like these delivered straight to your phone? Download the Us Weekly iPhone app now!